
                                       UNITED STATES
                           SECURITIES AND EXCHANGE COMMISSION
                                 Washington, D.C.  20549


                                        FORM 8-K


                     Current Report Pursuant To Section 13 or 15(d) of
                            the Securities Exchange Act of 1934

           Date of Report (Date of earliest event reported):  July 25, 2005
                         (Date of earliest event reported)

          Ameriquest Mortgage Securities Inc (as Depositor under the Pooling
          and Servicing Agreement, dated as May 1, 2005, providing for the
          issuance of Asset-Backed Pass-Through Certificates, Series 2005-R4)
                 (Exact name of registrant as specified in charter)


                                       DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-121781-04                          33-0885129
          (Commission File Number)        (I.R.S. Employer Identification No.)


          1100 TOWN & COUNTRY ROAD, SUITE 1100
          ORANGE, CALIFORNIA                              92868
          (Address of principal executive offices)     (Zip Code)


          Registrant's Telephone Number, Including Area Code:  (714) 564-0660


(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any
of the following provisions (see General Instruction A.2. below):

[  ] Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

[  ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act
(17 CFR 240.14a-12(b))

[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))


     Item 8.01  Other Events

     Attached hereto is a copy of the Monthly Remittance Statements to the
     Certificateholders which was derived from the monthly information
     submitted by the Master Servicer of the Trust to the Trustee.


     Item 9.01 Financial Statements and Exhibits

     (c) Exhibits:

     Exhibit No. Description

     99.1 Monthly Remittance Statement to the Certificateholders dated as of
     July 25, 2005.

                                    Signatures

               Pursuant to the requirements of the Securities Exchange Act of
          1934, the Registrant has duly caused this report to be signed on its
          behalf by the undersigned, hereunto duly authorized.


                                  Deutsche Bank National Trust Company,
                                  in its capacity as Trustee under the
                                  Pooling and Servicing Agreement on
                                  behalf of Ameriquest Mortgage
                                  Securities Inc., Registrant


          Date:  Jul 27, 2005               By:  /s/  Katherine M. Wannenmacher
                                            Katherine M. Wannenmacher
                                            Vice President


                                   EXHIBIT INDEX

          DOCUMENT

          99.1 Monthly Remittance Statement to the Certificateholders
          dated as of July 25, 2005.



Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

				External Parties						Table of Contents

													Page
				Seller									Page
				Seller						1. Certificate Payment Report					2
				Ameriquest Mtg Sec Inc						1. Certificate Payment Report					2
				Ameriquest Mtg Sec Inc						2. Collection Account Report					6
										2. Collection Account Report					6
										3. Credit Enhancement Report					8
										4. Collateral Report					9
				Certificate Insurer(s)						5. Delinquency Report					12
				Certificate Insurer(s)						5. Delinquency Report					12
										6. REO Report					15

										7. Foreclosure Report					16
										8. Prepayment Report					17
										9. Prepayment Detail Report					20
										9. Prepayment Detail Report					20
										10. Realized Loss Report					24
										11. Realized Loss Detail Report					27
				Servicer(s)						11. Realized Loss Detail Report					27
				Servicer(s)						12. Triggers and Adj. Cert. Report					28
				Ameriquest Mortgage Corp						12. Triggers and Adj. Cert. Report					28
				Ameriquest Mortgage Corp						13. Additional Certificate Report					29
										13. Additional Certificate Report					29


				Underwriter(s)
				Goldman Sachs & Co.
				J. P. Morgan
				BNP Paribas
				Citigroup

										Total Number of Pages					29
															29


				Dates						Contacts

				Cut-Off Date:			May 01, 2005			Valerie Delgado
				Close Date:			May 25, 2005			Administrator
				First Distribution Date:			June 27, 2005			(714) 247-6273
										valerie.m.delgado@db.com
										valerie.m.delgado@db.com
										Address:
										1761 East St. Andrew Place, Santa Ana, CA 92705
				Distribution Date:			July 25, 2005
										Factor Information:			(800) 735-7777
				Record Date:			June 30, 2005			Factor Information:			(800) 735-7777
										Main Phone Number:			(714) 247-6000

							July 22, 2005
							July 22, 2005

										https://www.tss.db.com/invr






Page 1 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Certificate Payment Report
Current Period Distribution - REMIC-IV
					Prior												Current
	Class		Original		Principal						Total		Realized		Deferred		Principal
	Class		Original		Principal						Total		Realized		Deferred		Principal
Class	Type	Cur	Face Value		Balance		Interest		Principal		Distribution		Loss		Interest		Balance


					(1)		(2)		(3)		(4)=(2)+(3)		(5)		(6)		(7)=(1)-(3)-(5)+(6)

A-1A	FLT,STEP	$	1,133,764,000.00		1,118,294,370.55		3,082,846.82		15,991,779.42		19,074,626.24		0.00		0.00		1,102,302,591.13
A-1A	FLT,STEP	$	1,133,764,000.00		1,118,294,370.55		3,082,846.82		15,991,779.42		19,074,626.24		0.00		0.00		1,102,302,591.13
A-1B	FLT,STEP	$	283,441,000.00		279,573,592.64		781,584.01		3,997,944.85		4,779,528.86		0.00		0.00		275,575,647.79
A-2A	FLT,STEP	$	127,959,000.00		123,973,984.00		327,300.41		8,412,518.77		8,739,819.18		0.00		0.00		115,561,465.23
A-2B	FLT,STEP	$	59,971,000.00		59,971,000.00		161,126.48		0.00		161,126.48		0.00		0.00		59,971,000.00
A-2C	FLT,STEP	$	104,867,000.00		104,867,000.00		288,275.42		0.00		288,275.42		0.00		0.00		104,867,000.00
A-2D	FLT,STEP	$	45,998,000.00		45,998,000.00		130,024.39		0.00		130,024.39		0.00		0.00		45,998,000.00
M-1	MEZ,STEP,FL	$	41,000,000.00		41,000,000.00		119,404.12		0.00		119,404.12		0.00		0.00		41,000,000.00
M-2	MEZ,STEP,FL	$	48,000,000.00		48,000,000.00		140,536.85		0.00		140,536.85		0.00		0.00		48,000,000.00
M-3	MEZ,STEP,FL	$	29,000,000.00		29,000,000.00		85,584.35		0.00		85,584.35		0.00		0.00		29,000,000.00
M-4	MEZ,STEP,FL	$	25,000,000.00		25,000,000.00		76,696.28		0.00		76,696.28		0.00		0.00		25,000,000.00
M-5	MEZ,STEP,FL	$	21,000,000.00		21,000,000.00		64,751.54		0.00		64,751.54		0.00		0.00		21,000,000.00
M-6	MEZ,STEP,FL	$	13,000,000.00		13,000,000.00		40,286.51		0.00		40,286.51		0.00		0.00		13,000,000.00
M-7	MEZ,STEP,FL	$	10,000,000.00		10,000,000.00		35,111.84		0.00		35,111.84		0.00		0.00		10,000,000.00
M-8	MEZ,STEP,FL	$	10,000,000.00		10,000,000.00		35,889.62		0.00		35,889.62		0.00		0.00		10,000,000.00
M-9	MEZ,STEP,FL	$	13,000,000.00		13,000,000.00		51,206.51		0.00		51,206.51		0.00		0.00		13,000,000.00
M-10	MEZ,STEP,FL	$	13,000,000.00		13,000,000.00		61,317.62		0.00		61,317.62		0.00		0.00		13,000,000.00
M-11	MEZ,STEP,FL	$	11,000,000.00		11,000,000.00		51,884.14		0.00		51,884.14		0.00		0.00		11,000,000.00
CE	SUB	$	9,999,900.00		10,000,000.00		3,655,302.55		0.00		3,655,302.55		0.00		0.00		10,000,000.00
P	SUB	$	100.00		100.00		226,617.48		0.00		226,617.48		0.00		0.00		100.00
R	R	$	0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00


Total			2,000,000,000.00		1,976,678,047.19		9,415,746.94		28,402,243.04		37,817,989.98		0.00		0.00		1,948,275,804.15
Total





Page 2 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face-
									Orig. Principal		Prior							Current
									Orig. Principal		Prior							Current
	Period		Period						(with Notional)		Principal						Total	Principal
	Period		Period
Class	Starting		Ending		Method		Cusip		Balance		Balance		Interest		Principal		Distribution	Balance

									(1)		(1)		(2)		(3)		(4)=(2)+(3)	(5)
A-1A	06/27/05		07/24/05		A-Act/360		03072SB46		1,133,764,000.00		986.355512		2.719126		14.105034		16.824159	972.250478
A-1B	06/27/05		07/24/05		A-Act/360		03072SB53		283,441,000.00		986.355512		2.757484		14.105034		16.862518	972.250478
A-2A	06/27/05		07/24/05		A-Act/360		03072SB61		127,959,000.00		968.857087		2.557854		65.743861		68.301715	903.113226
A-2B	06/27/05		07/24/05		A-Act/360		03072SB79		59,971,000.00		1,000.000000		2.686740		0.000000		2.686740	1,000.000000
A-2C	06/27/05		07/24/05		A-Act/360		03072SB87		104,867,000.00		1,000.000000		2.748962		0.000000		2.748962	1,000.000000
A-2D	06/27/05		07/24/05		A-Act/360		03072SB95		45,998,000.00		1,000.000000		2.826740		0.000000		2.826740	1,000.000000
M-1	06/27/05		07/24/05		A-Act/360		03072SC29		41,000,000.00		1,000.000000		2.912296		0.000000		2.912296	1,000.000000
M-2	06/27/05		07/24/05		A-Act/360		03072SC37		48,000,000.00		1,000.000000		2.927851		0.000000		2.927851	1,000.000000
M-3	06/27/05		07/24/05		A-Act/360		03072SC45		29,000,000.00		1,000.000000		2.951184		0.000000		2.951184	1,000.000000
M-4	06/27/05		07/24/05		A-Act/360		03072SC52		25,000,000.00		1,000.000000		3.067851		0.000000		3.067851	1,000.000000
M-5	06/27/05		07/24/05		A-Act/360		03072SC60		21,000,000.00		1,000.000000		3.083407		0.000000		3.083407	1,000.000000
M-6	06/27/05		07/24/05		A-Act/360		03072SC78		13,000,000.00		1,000.000000		3.098962		0.000000		3.098962	1,000.000000
M-7	06/27/05		07/24/05		A-Act/360		03072SC86		10,000,000.00		1,000.000000		3.511184		0.000000		3.511184	1,000.000000
M-8	06/27/05		07/24/05		A-Act/360		03072SC94		10,000,000.00		1,000.000000		3.588962		0.000000		3.588962	1,000.000000
M-9	06/27/05		07/24/05		A-Act/360		03072SD28		13,000,000.00		1,000.000000		3.938962		0.000000		3.938962	1,000.000000
M-10	06/27/05		07/24/05		A-Act/360		03072SD36		13,000,000.00		1,000.000000		4.716740		0.000000		4.716740	1,000.000000
M-11	06/27/05		07/24/05		A-Act/360		03072SD44		11,000,000.00		1,000.000000		4.716740		0.000000		4.716740	1,000.000000
CE	06/01/05		06/30/05		F-30/360				2,009,999,900.00		4.975125		1.818559		0.000000		1.818559	4.975125
P	06/01/05		06/30/05		F-30/360				100.00		1,000.000000		2,266,174.800000		0.000000		2,266,174.800000	1,000.000000
R	06/01/05		06/30/05		F-30/360				0.00		0.000000		0.000000		0.000000		0.000000	0.000000




Page 3 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Distribution to Date - REMIC-IV
																	Current


	Original				Unscheduled		Scheduled		Total		Total		Realized		Deferred		Principal

Class	Face Value		Interest		Principal		Principal		Principal		Distribution		Loss		Interest		Balance
	(1)		(2)		(3)		(4)		(5)=(3)+(4)		(6)=(2)+(5)		(7)		(8)		(9)=(1)-(5)-(7)+(8)
A-1A	1,133,764,000.00		6,533,268.59		29,870,382.02		1,591,026.85		31,461,408.87		37,994,677.46		0.00		0.00		1,102,302,591.13
A-1B	283,441,000.00		1,657,180.50		7,467,595.50		397,756.71		7,865,352.21		9,522,532.71		0.00		0.00		275,575,647.79
A-2A	127,959,000.00		699,127.94		11,768,112.56		629,422.21		12,397,534.77		13,096,662.71		0.00		0.00		115,561,465.23
A-2B	59,971,000.00		338,690.62		0.00		0.00		0.00		338,690.62		0.00		0.00		59,971,000.00
A-2C	104,867,000.00		606,459.38		0.00		0.00		0.00		606,459.38		0.00		0.00		104,867,000.00
A-2D	45,998,000.00		273,806.47		0.00		0.00		0.00		273,806.47		0.00		0.00		45,998,000.00
M-1	41,000,000.00		251,697.45		0.00		0.00		0.00		251,697.45		0.00		0.00		41,000,000.00
M-2	48,000,000.00		296,296.85		0.00		0.00		0.00		296,296.85		0.00		0.00		48,000,000.00
M-3	29,000,000.00		180,486.85		0.00		0.00		0.00		180,486.85		0.00		0.00		29,000,000.00
M-4	25,000,000.00		161,946.28		0.00		0.00		0.00		161,946.28		0.00		0.00		25,000,000.00
M-5	21,000,000.00		136,746.54		0.00		0.00		0.00		136,746.54		0.00		0.00		21,000,000.00
M-6	13,000,000.00		85,093.18		0.00		0.00		0.00		85,093.18		0.00		0.00		13,000,000.00
M-7	10,000,000.00		74,436.84		0.00		0.00		0.00		74,436.84		0.00		0.00		10,000,000.00
M-8	10,000,000.00		76,131.29		0.00		0.00		0.00		76,131.29		0.00		0.00		10,000,000.00
M-9	13,000,000.00		108,883.18		0.00		0.00		0.00		108,883.18		0.00		0.00		13,000,000.00
M-10	13,000,000.00		130,910.95		0.00		0.00		0.00		130,910.95		0.00		0.00		13,000,000.00
M-11	11,000,000.00		110,770.81		0.00		0.00		0.00		110,770.81		0.00		0.00		11,000,000.00
CE	9,999,900.00		5,334,338.89		0.00		0.00		0.00		5,334,338.89		0.00		100.00		10,000,000.00
P	100.00		415,668.61		0.00		0.00		0.00		415,668.61		0.00		0.00		100.00
R	0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00


Total	2,000,000,000.00		17,471,941.22		49,106,090.08		2,618,205.77		51,724,295.85		69,196,237.07		0.00		100.00		1,948,275,804.15



Page 4 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Interest Detail - REMIC-IV
	Pass		Prior Principal				Non-		Prior		Unscheduled				Paid or		Current
	Pass		Prior Principal				Non-		Prior		Unscheduled				Paid or

	Through		(with Notional)		Accrued		Supported		Unpaid		Interest		Optimal		Deferred		Unpaid

Class	Rate		Balance		Interest		Interest SF		Interest		Adjustment		Interest		Interest		Interest
					(1)		(2)		(3)		(4)		(5)=(1)-(2)+(3)+(4)		(6)		(7)=(5)-(6)
A-1A	3.54438%		1,118,294,370.55		3,082,846.82		0.00		0.00		0.00		3,082,846.82		3,082,846.82		0.00
A-1B	3.59438%		279,573,592.64		781,584.01		0.00		0.00		0.00		781,584.01		781,584.01		0.00
A-2A	3.39438%		123,973,984.00		327,300.41		0.00		0.00		0.00		327,300.41		327,300.41		0.00
A-2B	3.45438%		59,971,000.00		161,126.48		0.00		0.00		0.00		161,126.48		161,126.48		0.00
A-2C	3.53438%		104,867,000.00		288,275.42		0.00		0.00		0.00		288,275.42		288,275.42		0.00
A-2D	3.63438%		45,998,000.00		130,024.39		0.00		0.00		0.00		130,024.39		130,024.39		0.00
M-1	3.74438%		41,000,000.00		119,404.12		0.00		0.00		0.00		119,404.12		119,404.12		0.00
M-2	3.76438%		48,000,000.00		140,536.85		0.00		0.00		0.00		140,536.85		140,536.85		0.00
M-3	3.79438%		29,000,000.00		85,584.35		0.00		0.00		0.00		85,584.35		85,584.35		0.00
M-4	3.94438%		25,000,000.00		76,696.28		0.00		0.00		0.00		76,696.28		76,696.28		0.00
M-5	3.96438%		21,000,000.00		64,751.54		0.00		0.00		0.00		64,751.54		64,751.54		0.00
M-6	3.98438%		13,000,000.00		40,286.51		0.00		0.00		0.00		40,286.51		40,286.51		0.00
M-7	4.51438%		10,000,000.00		35,111.84		0.00		0.00		0.00		35,111.84		35,111.84		0.00
M-8	4.61438%		10,000,000.00		35,889.62		0.00		0.00		0.00		35,889.62		35,889.62		0.00
M-9	5.06438%		13,000,000.00		51,206.51		0.00		0.00		0.00		51,206.51		51,206.51		0.00
M-10	6.06438%		13,000,000.00		61,317.62		0.00		0.00		0.00		61,317.62		61,317.62		0.00
M-11	6.06438%		11,000,000.00		51,884.14		0.00		0.00		0.00		51,884.14		51,884.14		0.00
CE	438.63631%		10,000,000.00		0.00		0.00		0.00		0.00		0.00		3,655,302.55		0.00
P	2,719,409.76000%		100.00		0.00		0.00		0.00		0.00		0.00		226,617.48		0.00
R	0.00000%		0.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00


Total			1,976,678,047.19		5,533,826.91		0.00		0.00		0.00		5,533,826.91		9,415,746.94		0.00



Page 5 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Collection Account Report
SUMMARY
SUMMARY
										Group 2		Group 1		Total
Principal Collections										8,412,518.77		19,989,724.27		28,402,243.04
Principal Withdrawals										0.00		0.00		0.00
Principal Other Accounts										0.00		0.00		0.00
TOTAL NET PRINCIPAL										8,412,518.77		19,989,724.27		#######
Interest Collections										2,299,747.27		9,922,806.38		12,222,553.65
Interest Withdrawals										-0.00		-0.00		-0.00
Interest Fees										-282,238.06		-1,069,666.03		-1,511,023.10
Interest Other Accounts										0.00		0.00		226,617.48
TOTAL NET INTEREST										2,017,509.21		8,853,140.35		10,938,148.03
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION										10,430,027.98		28,842,864.62		37,817,989.98



PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
											Group 2		Group 1		Total
Scheduled Principal Received											255,393.17		1,197,268.51		1,452,661.68
Curtailments											20,029.82		159,638.06		179,667.88
Prepayments In Full											7,675,312.10		17,506,822.16		25,182,134.26
Repurchased/Substitutions											461,783.68		1,125,995.54		1,587,779.22
Liquidations											0.00		0.00		0.00
Insurance Principal											0.00		0.00		0.00
Other Additional Principal											0.00		0.00		0.00
Delinquent Principal											-190,511.90		-871,504.61		-1,062,016.51
Realized Losses											-0.00		-0.00		-0.00
Advanced Principal											190,511.90		871,504.61		1,062,016.51
TOTAL PRINCIPAL COLLECTED											8,412,518.77		19,989,724.27		28,402,243.04


PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK



PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
										Group 2		Group 1		Total
TOTAL PRINCIPAL OTHER ACCOUNTS										0.00		0.00		0.00





Page 6 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
										Group 2		Group 1		Total
Scheduled Interest										2,418,631.12		10,413,748.65		12,832,379.77
Repurchased/Substitution Interest										3,097.80		7,297.41		10,395.21
Liquidation Interest										0.00		0.00		0.00
Insurance Interest										0.00		0.00		0.00
Other Additional Interest										0.00		0.00		0.00
Prepayment Interest Shortfalls										-11,579.38		-20,715.70		-32,295.08
Delinquent Interest										-1,870,310.75		-7,874,191.37		-9,744,502.12
Compensating Interest										11,579.37		20,715.70		32,295.07
Civil Relief Act Shortfalls										-0.00		-130.35		-130.35
Interest Advanced										1,748,329.10		7,376,082.05		9,124,411.15
TOTAL INTEREST COLLECTED										2,299,747.27		9,922,806.38		12,222,553.65


INTEREST - WITHDRAWALS
INTEREST - WITHDRAWALS
										Group 2		Group 1		Total
Non-Recoverable Advances										0.00		0.00		0.00
TOTAL INTEREST WITHDRAWALS										0.00		0.00		0.00



INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
										Group 2		Group 1		Total
Prepayment Charges														226,617.48
Net WAC Investment Income
TOTAL INTEREST OTHER ACCOUNTS										0.00		0.00		226,617.48



INTEREST - FEES
INTEREST - FEES
										Group 2		Group 1		Total
Current Servicing Fees										159,119.01		44,405.36		203,524.37
Trustee Fees										318.24		1,328.99		1,647.23
PMI										270,701.40		1,035,150.10		1,305,851.50
SWAP (INFLOW) / OUTFLOW														1,522,401.09
TOTAL INTEREST FEES										282,238.06		1,069,666.03		1,511,023.10




Page 7 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Credit Enhancement Report
ACCOUNTS
ACCOUNTS
										Group 2		Group 1		Total
Net WAC Reserve Account Balance



INSURANCE
INSURANCE
										Group 2		Group 1		Total
PMI										270,701.40		1,035,150.10		1,305,851.50



STRUCTURAL FEATURES
STRUCTURAL FEATURES
										Group 2		Group 1		Total
Overcollateralized Amount														10,000,000.00
Overcollateralization Reduction Amount														0.00
Overcollateralization Deficiency Amount														0.00
Overcollateralization Target Amount														10,000,000.00





Page 8 of 29
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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Collateral Report


COLLATERAL



											Group 2		Group 1		Total



Loan Count:


Original										874		8,391		9,265
Prior										1,113		10,432		11,545
Prefunding										250		2,150		2,400
Scheduled Paid Offs										-0		-0		-0
Full Voluntary Prepayments										-18		-89		-107
Repurchases										-1		-7		-8
Liquidations										-0		-0		-0
Current										1,094		10,336		11,430
Principal Balance:


Original										308,697,370.82		1,291,301,843.92		1,599,999,214.74
Prior										381,885,621.68		1,594,791,185.14		1,976,676,806.82
Prefunding										0.00		0.00		0.00
Scheduled Principal										-255,393.17		-1,197,268.51		-1,452,661.68
Partial Prepayments										-20,029.82		-159,638.06		-179,667.88
Full Voluntary Prepayments										-7,675,312.10		-17,506,822.16		-25,182,134.26
Repurchases										-461,783.68		-1,125,995.54		-1,587,779.22
Liquidations										-0.00		-0.00		-0.00
Current										373,473,102.91		1,574,801,460.87		1,948,274,563.78





PREFUNDING
PREFUNDING
										Group 2		Group 1		Total
Prefunding Account Original Balance										77,174,379.59		322,826,405.67		400,000,785.26
Subsequent Loans Added to the Pool										77,173,249.77		322,826,295.12		399,999,544.89
Prefund Release to Certificate Holders										0.00		0.00		0.00
Prefunding Account Ending Balance										1,129.82		110.55		1,240.37






Page 9 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

CHARACTERISTICS
CHARACTERISTICS
										Group 2		Group 1		Total
Weighted Average Coupon Original										7.62921%		7.84569%		7.80393%
Weighted Average Coupon Prior										7.62921%		7.84569%		7.80393%
Weighted Average Coupon Current										7.60980%		7.84151%		7.79675%
Weighted Average Months to Maturity Original										355		350		351
Weighted Average Months to Maturity Prior										355		350		351
Weighted Average Months to Maturity Current										354		350		350
Weighted Avg Remaining Amortization Term Original										355		350		351
Weighted Avg Remaining Amortization Term Prior										355		350		351
Weighted Avg Remaining Amortization Term Current										354		350		350
Weighted Average Seasoning Original										2.14		2.23		2.21
Weighted Average Seasoning Prior										2.14		2.23		2.21
Weighted Average Seasoning Current										2.76		2.83		2.82









Page 10 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

ARM CHARACTERISTICS
ARM CHARACTERISTICS
										Group 2		Group 1		Total
Weighted Average Margin Original										5.60803%		5.84253%		5.79733%
Weighted Average Margin Prior										5.60803%		5.84253%		5.79733%
Weighted Average Margin Current										5.62000%		5.84029%		5.79777%
Weighted Average Max Rate Original										13.85927%		14.03536%		14.00141%
Weighted Average Max Rate Prior										13.85927%		14.03536%		14.00141%
Weighted Average Max Rate Current										13.83672%		14.03090%		13.99342%
Weighted Average Min Rate Original										7.85927%		8.03536%		8.00141%
Weighted Average Min Rate Prior										7.85927%		8.03536%		8.00141%
Weighted Average Min Rate Current										7.83672%		8.03090%		7.99342%
Weighted Average Cap Up Original										1.00000%		1.00000%		1.00000%
Weighted Average Cap Up Prior										1.00000%		1.00000%		1.00000%
Weighted Average Cap Up Current										1.00000%		1.00000%		1.00000%
Weighted Average Cap Down Original										1.00000%		1.00000%		1.00000%
Weighted Average Cap Down Prior										1.00000%		1.00000%		1.00000%
Weighted Average Cap Down Current										1.00000%		1.00000%		1.00000%




SERVICING FEES & ADVANCES

											Group 2		Group 1		Total




Current Servicing Fees										159,119.01		44,405.36		203,524.37
Delinquent Servicing Fees										121,981.65		498,109.33		620,090.98
TOTAL SERVICING FEES										159,119.01		664,496.34		823,615.35


Total Servicing Fees										159,119.01		664,496.34		823,615.35
Compensating Interest										-11,579.37		-20,715.70		-32,295.07
Delinquent Servicing Fees										-121,981.65		-498,109.33		-620,090.98
COLLECTED SERVICING FEES										25,557.99		145,671.32		171,229.31


Total Advanced Interest										1,748,329.10		7,376,082.05		9,124,411.15
Total Advanced Principal										190,511.90		871,504.61		1,062,016.51
Aggregate Advances with respect to this Distribution										1,938,841.01		8,247,586.66		10,186,427.67





ADDITIONAL COLLATERAL INFORMATION
										Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)										11,579.38		20,715.70		32,295.08
Compensating Interest										-11,579.37		-20,715.70		-32,295.07
Net Prepayment Interest Shortfall (PPIS)										0.00		0.00		0.00


Ending Pool Stated Principal Balance										373,473,102.91		1,574,801,460.87		1,948,274,563.78
Weighted Average Net Mortgage Rate										6.339623%		6.661640%		6.640405%




Page 11 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Delinquency Report

	TOTAL
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				6,671,901.70		239,098.21		0.00		6,910,999.91
			% Balance				0.34%		0.01%		0.00%		0.35%
			# Loans				35		1		0		36
			% # Loans				0.31%		0.01%		0.00%		0.31%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		376,983.13		0.00		0.00		0.00		376,983.13
			% Balance		0.02%		0.00%		0.00%		0.00%		0.02%
			# Loans		4		0		0		0		4
			% # Loans		0.03%		0.00%		0.00%		0.00%		0.03%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		376,983.13		6,671,901.70		239,098.21		0.00		7,287,983.04
			% Balance		0.02%		0.34%		0.01%		0.00%		0.37%
			# Loans		4		35		1		0		40
			% # Loans		0.03%		0.31%		0.01%		0.00%		0.35%









Page 12 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution


	GROUP 1
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				4,383,460.93		239,098.21		0.00		4,622,559.14
			% Balance				0.28%		0.02%		0.00%		0.29%
			# Loans				30		1		0		31
			% # Loans				0.29%		0.01%		0.00%		0.30%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		315,522.20		0.00		0.00		0.00		315,522.20
			% Balance		0.02%		0.00%		0.00%		0.00%		0.02%
			# Loans		3		0		0		0		3
			% # Loans		0.03%		0.00%		0.00%		0.00%		0.03%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		315,522.20		4,383,460.93		239,098.21		0.00		4,938,081.34
			% Balance		0.02%		0.28%		0.02%		0.00%		0.31%
			# Loans		3		30		1		0		34
			% # Loans		0.03%		0.29%		0.01%		0.00%		0.33%










Page 13 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

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Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

	GROUP 2
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				2,288,440.77		0.00		0.00		2,288,440.77
			% Balance				0.61%		0.00%		0.00%		0.61%
			# Loans				5		0		0		5
			% # Loans				0.46%		0.00%		0.00%		0.46%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		61,460.93		0.00		0.00		0.00		61,460.93
			% Balance		0.02%		0.00%		0.00%		0.00%		0.02%
			# Loans		1		0		0		0		1
			% # Loans		0.09%		0.00%		0.00%		0.00%		0.09%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		61,460.93		2,288,440.77		0.00		0.00		2,349,901.70
			% Balance		0.02%		0.61%		0.00%		0.00%		0.63%
			# Loans		1		5		0		0		6
			% # Loans		0.09%		0.46%		0.00%		0.00%		0.55%









Page 14 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
REO Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date




TOTAL


Page 15 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Foreclosure Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date




TOTAL


Page 16 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Prepayment Report

VOLUNTARY PREPAYMENTS
VOLUNTARY PREPAYMENTS

											Group 2		Group 1		Total




Current


Number of Paid in Full Loans										18		89		107
Number of Repurchased Loans										1		7		8
Total Number of Loans Prepaid in Full										19		96		115
Curtailments Amount										20,029.82		159,638.06		179,667.88
Paid in Full Balance										7,675,312.10		17,506,822.16		25,182,134.26
Repurchased Loans Balance										461,783.68		1,125,995.54		1,587,779.22
Total Prepayment Amount										8,157,125.60		18,792,455.76		26,949,581.36

Cumulative


Number of Paid in Full Loans										29		148		177
Number of Repurchased Loans										1		57		58
Total Number of Loans Prepaid in Full										30		205		235
Paid in Full Balance										11,419,644.95		27,682,161.94		39,101,806.89
Repurchased Loans Balance										461,783.68		9,125,920.73		9,587,704.41
Curtailments Amount										52,662.74		363,821.03		416,483.77
Total Prepayment Amount										11,934,091.37		37,171,903.70		49,105,995.07










Page 17 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

VOLUNTARY PREPAYMENTS RATES
VOLUNTARY PREPAYMENTS RATES

											Group 2		Group 1		Total



SMM										2.14%		1.18%		1.36%
3 Months Avg SMM										1.68%		1.30%		1.38%
12 Months Avg SMM										1.68%		1.30%		1.38%
Avg SMM Since Cut-off										1.68%		1.30%		1.38%


CPR										22.84%		13.27%		15.20%
3 Months Avg CPR										18.42%		14.55%		15.31%
12 Months Avg CPR										18.42%		14.55%		15.31%
Avg CPR Since Cut-off										18.42%		14.55%		15.31%


PSA										4,138.51%		2,344.52%		2,698.38%
3 Months Avg PSA Approximation										3,755.48%		2,878.40%		3,045.76%
12 Months Avg PSA Approximation										3,755.48%		2,878.40%		3,045.76%
Avg PSA Since Cut-off Approximation										3,755.48%		2,878.40%		3,045.76%










Page 18 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution






PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidations )/(Beg Principal Balance - Sched Principal) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) PSA Standard Prepayment Model: CPR/(0.002min(30,WAS)) Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn)(1-SMMn+1)...(1-SMMm)]^(1/months in period n,m) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m)) Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m) Weighted Average Seasoning (WAS) Dates correspond to distribution dates. Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.













Page 19 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Prepayment Detail Report
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan Number			Original							Current		State &		Type Prepayment

&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date

101261345 2			416,500.00		415,179.21			20-Jun-2005		9.250%		CA - 85.00%		Paid Off - 360		01-Jan-2005
			416,500.00

102869229 1			252,506.00		250,314.41			21-Jun-2005		6.750%		IL - 89.73%		Paid Off - 360		01-Feb-2005
102869229 1					250,314.41			21-Jun-2005		6.750%		IL - 89.73%		Paid Off - 360		01-Feb-2005
102941606 1			91,500.00		91,232.87			08-Jul-2005		8.750%		AL - 74.21%		Paid Off - 360		01-Feb-2005
102941606 1					91,232.87			08-Jul-2005		8.750%		AL - 74.21%		Paid Off - 360		01-Feb-2005
103007647 1			205,200.00		203,283.91			14-Jun-2005		6.750%		CA - 90.00%		Paid Off - 360		01-Feb-2005
103007647 1					203,283.91			14-Jun-2005		6.750%		CA - 90.00%		Paid Off - 360		01-Feb-2005
103392064 2			488,000.00		486,829.06			30-Jun-2005		8.600%		NY - 73.66%		Paid Off - 360		01-Mar-2005
103392064 2					486,829.06			30-Jun-2005		8.600%		NY - 73.66%		Paid Off - 360		01-Mar-2005
103920963 1			200,000.00		198,993.56			27-Jun-2005		5.990%		MA - 33.33%		Paid Off - 360		01-Mar-2005
103920963 1					198,993.56			27-Jun-2005		5.990%		MA - 33.33%		Paid Off - 360		01-Mar-2005
104399282 1			139,400.00		138,986.39			06-Jul-2005		7.550%		PA - 85.00%		Paid Off - 360		01-Mar-2005
104399282 1					138,986.39			06-Jul-2005		7.550%		PA - 85.00%		Paid Off - 360		01-Mar-2005
104458641 1			147,000.00		146,654.43			29-Jun-2005		8.700%		CA - 60.00%		Paid Off - 360		01-Mar-2005
104458641 1					146,654.43			29-Jun-2005		8.700%		CA - 60.00%		Paid Off - 360		01-Mar-2005
104576947 1			245,400.00		243,496.79			30-Jun-2005		6.990%		RI - 80.99%		Paid Off - 240		01-Mar-2005
104576947 1					243,496.79			30-Jun-2005		6.990%		RI - 80.99%		Paid Off - 240		01-Mar-2005
104884788 1			340,000.00		339,246.19			28-Jun-2005		8.990%		CA - 85.00%		Paid Off - 360		01-Mar-2005
104884788 1					339,246.19			28-Jun-2005		8.990%		CA - 85.00%		Paid Off - 360		01-Mar-2005
105109821 1			225,000.00		224,448.93			07-Jul-2005		8.500%		CA - 73.77%		Paid Off - 360		01-Mar-2005
105109821 1					224,448.93			07-Jul-2005		8.500%		CA - 73.77%		Paid Off - 360		01-Mar-2005
105116081 1			435,000.00		434,115.55			13-Jun-2005		9.400%		NY - 74.11%		Paid Off - 360		01-Mar-2005
105116081 1					434,115.55			13-Jun-2005		9.400%		NY - 74.11%		Paid Off - 360		01-Mar-2005
105250625 2			77,000.00		76,850.18			30-Jun-2005		9.650%		IN - 70.00%		Paid Off - 360		01-Mar-2005
105250625 2					76,850.18			30-Jun-2005		9.650%		IN - 70.00%		Paid Off - 360		01-Mar-2005
105334288 1			190,000.00		189,571.37			05-Jul-2005		8.900%		FL - 74.51%		Paid Off - 360		01-Mar-2005
105334288 1					189,571.37			05-Jul-2005		8.900%		FL - 74.51%		Paid Off - 360		01-Mar-2005
105628606 1			155,250.00		154,731.42			14-Jun-2005		6.950%		CT - 77.63%		Paid Off - 360		01-Mar-2005
105628606 1					154,731.42			14-Jun-2005		6.950%		CT - 77.63%		Paid Off - 360		01-Mar-2005
105714984 2			378,750.00		377,955.44			23-Jun-2005		9.250%		NJ - 73.98%		Paid Off - 360		01-Mar-2005
105714984 2					377,955.44			23-Jun-2005		9.250%		NJ - 73.98%		Paid Off - 360		01-Mar-2005
105746762 1			136,176.00		135,759.74			16-Jun-2005		7.400%		FL - 63.10%		Paid Off - 360		01-Mar-2005
105746762 1					135,759.74			16-Jun-2005		7.400%		FL - 63.10%		Paid Off - 360		01-Mar-2005
105868061 1			116,000.00		115,668.25			06-Jul-2005		6.300%		CA - 63.28%		Paid Off - 360		01-Apr-2005
105868061 1					115,668.25			06-Jul-2005		6.300%		CA - 63.28%		Paid Off - 360		01-Apr-2005
106137946 1			364,000.00		363,462.10			30-Jun-2005		10.900%		NY - 70.00%		Paid Off - 360		01-Mar-2005
106137946 1					363,462.10			30-Jun-2005		10.900%		NY - 70.00%		Paid Off - 360		01-Mar-2005
106213580 1			110,160.00		109,876.09			21-Jun-2005		8.250%		GA - 90.00%		Paid Off - 360		01-Mar-2005
106213580 1					109,876.09			21-Jun-2005		8.250%		GA - 90.00%		Paid Off - 360		01-Mar-2005
106444425 1			179,500.00		179,117.05			21-Jun-2005		9.300%		NJ - 52.03%		Paid Off - 360		01-Mar-2005
106444425 1					179,117.05			21-Jun-2005		9.300%		NJ - 52.03%		Paid Off - 360		01-Mar-2005
106877269 1			322,721.00		321,212.05			08-Jul-2005		6.150%		MD - 90.00%		Paid Off - 360		01-Mar-2005
106877269 1					321,212.05			08-Jul-2005		6.150%		MD - 90.00%		Paid Off - 360		01-Mar-2005
107142663 1			84,500.00		83,806.73			08-Jul-2005		8.700%		LA - 83.66%		Paid Off - 180		01-Apr-2005
107142663 1					83,806.73			08-Jul-2005		8.700%		LA - 83.66%		Paid Off - 180		01-Apr-2005
107160426 1			149,500.00		149,168.95			30-Jun-2005		8.990%		WI - 74.75%		Paid Off - 360		01-Mar-2005
107160426 1					149,168.95			30-Jun-2005		8.990%		WI - 74.75%		Paid Off - 360		01-Mar-2005
107584948 1			182,320.00		181,594.81			27-Jun-2005		6.350%		MA - 80.00%		Paid Off - 360		01-Mar-2005
107584948 1					181,594.81			27-Jun-2005		6.350%		MA - 80.00%		Paid Off - 360		01-Mar-2005
107747602 2			499,500.00		497,418.60			27-Jun-2005		5.800%		CA - 89.91%		Paid Off - 360		01-Mar-2005
107747602 2					497,418.60			27-Jun-2005		5.800%		CA - 89.91%		Paid Off - 360		01-Mar-2005
107818940 2			750,000.00		749,506.89			16-Jun-2005		8.100%		CA - 74.26%		Paid Off - 360		01-Jun-2005
107818940 2					749,506.89			16-Jun-2005		8.100%		CA - 74.26%		Paid Off - 360		01-Jun-2005
108251844 1			130,000.00		129,784.91			30-Jun-2005		8.990%		PA - 86.09%		Paid Off - 360		01-Apr-2005
108251844 1					129,784.91			30-Jun-2005		8.990%		PA - 86.09%		Paid Off - 360		01-Apr-2005
108439142 1			229,500.00		229,182.92			08-Jul-2005		9.850%		NJ - 85.00%		Paid Off - 360		01-Apr-2005
108439142 1					229,182.92			08-Jul-2005		9.850%		NJ - 85.00%		Paid Off - 360		01-Apr-2005
108460189 1			106,500.00		106,327.77			15-Jun-2005		9.100%		AZ - 32.47%		Paid Off - 360		01-Apr-2005
108460189 1					106,327.77			15-Jun-2005		9.100%		AZ - 32.47%		Paid Off - 360		01-Apr-2005
108504721 2			406,404.00		405,388.85			01-Jul-2005		6.950%		CA - 90.00%		Paid Off - 360		01-Apr-2005
108504721 2					405,388.85			01-Jul-2005		6.950%		CA - 90.00%		Paid Off - 360		01-Apr-2005
108652561 1			296,000.00		295,603.03			08-Jul-2005		9.990%		NJ - 74.94%		Paid Off - 360		01-Apr-2005
108652561 1					295,603.03			08-Jul-2005		9.990%		NJ - 74.94%		Paid Off - 360		01-Apr-2005
108692187 1			188,000.00		187,648.78			23-Jun-2005		8.400%		MD - 72.31%		Paid Off - 360		01-Apr-2005
108692187 1					187,648.78			23-Jun-2005		8.400%		MD - 72.31%		Paid Off - 360		01-Apr-2005
108692369 1			198,000.00		197,714.64			28-Jun-2005		9.650%		MN - 90.00%		Paid Off - 360		01-Apr-2005
108692369 1					197,714.64			28-Jun-2005		9.650%		MN - 90.00%		Paid Off - 360		01-Apr-2005
109305565 1			127,710.00		127,476.24			30-Jun-2005		8.500%		FL - 85.14%		Paid Off - 360		01-Apr-2005
109305565 1					127,476.24			30-Jun-2005		8.500%		FL - 85.14%		Paid Off - 360		01-Apr-2005
109496083 1			69,000.00		68,905.65			28-Jun-2005		9.900%		TX - 60.00%		Paid Off - 360		01-Apr-2005
109496083 1					68,905.65			28-Jun-2005		9.900%		TX - 60.00%		Paid Off - 360		01-Apr-2005
109603860 1			320,000.00		319,414.28			27-Jun-2005		8.500%		MD - 80.00%		Paid Off - 360		01-Apr-2005
109603860 1					319,414.28					8.500%		MD - 80.00%		Paid Off - 360


Page 20 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan Number			Original							Current		State &		Type Prepayment

&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date

109606046 1			60,000.00		49,818.36			24-Jun-2005		10.300%		LA - 52.17%		Paid Off - 360		01-Apr-2005
			60,000.00

109743849 2			185,500.00		185,322.63			27-Jun-2005		11.600%		NJ - 70.00%		Paid Off - 360		01-Apr-2005
109743849 2					185,322.63			27-Jun-2005		11.600%		NJ - 70.00%		Paid Off - 360		01-Apr-2005
110123221 1			599,000.00		598,134.51			24-Jun-2005		7.650%		FL - 74.88%		Paid Off - 360		01-May-2005
110123221 1					598,134.51			24-Jun-2005		7.650%		FL - 74.88%		Paid Off - 360		01-May-2005
110669363 1			103,500.00		103,354.89			05-Jul-2005		7.800%		AZ - 58.48%		Paid Off - 360		01-May-2005
110669363 1					103,354.89			05-Jul-2005		7.800%		AZ - 58.48%		Paid Off - 360		01-May-2005
110804663 2			599,400.00		598,878.68			05-Jul-2005		10.100%		CA - 90.00%		Paid Off - 360		01-May-2005
110804663 2					598,878.68			05-Jul-2005		10.100%		CA - 90.00%		Paid Off - 360		01-May-2005
110884004 1			277,100.00		276,728.36			16-Jun-2005		9.990%		NY - 85.00%		Paid Off - 360		01-Apr-2005
110884004 1					276,728.36			16-Jun-2005		9.990%		NY - 85.00%		Paid Off - 360		01-Apr-2005
110885241 1			288,750.00		288,311.41			06-Jul-2005		7.400%		CA - 87.50%		Paid Off - 360		01-May-2005
110885241 1					288,311.41			06-Jul-2005		7.400%		CA - 87.50%		Paid Off - 360		01-May-2005
111310181 1			145,500.00		145,303.30			28-Jun-2005		7.990%		IL - 78.23%		Paid Off - 360		01-May-2005
111310181 1					145,303.30			28-Jun-2005		7.990%		IL - 78.23%		Paid Off - 360		01-May-2005
111320404 1			94,700.00		94,573.78			01-Jul-2005		8.050%		AL - 84.55%		Paid Off - 360		01-May-2005
111320404 1					94,573.78			01-Jul-2005		8.050%		AL - 84.55%		Paid Off - 360		01-May-2005
111358180 1			175,000.00		174,789.01			24-Jun-2005		8.550%		CA - 50.00%		Paid Off - 360		01-May-2005
111358180 1					174,789.01			24-Jun-2005		8.550%		CA - 50.00%		Paid Off - 360		01-May-2005
111492088 1			266,000.00		265,638.19			29-Jun-2005		7.950%		MD - 87.79%		Paid Off - 360		01-May-2005
111492088 1					265,638.19			29-Jun-2005		7.950%		MD - 87.79%		Paid Off - 360		01-May-2005
111948006 1			103,500.00		103,341.21			21-Jun-2005		7.350%		TN - 89.30%		Paid Off - 360		01-May-2005
111948006 1					103,341.21			21-Jun-2005		7.350%		TN - 89.30%		Paid Off - 360		01-May-2005
112016282 1			192,100.00		191,968.23			22-Jun-2005		11.200%		GA - 85.00%		Paid Off - 360		01-May-2005
112016282 1					191,968.23			22-Jun-2005		11.200%		GA - 85.00%		Paid Off - 360		01-May-2005
112034509 1			166,500.00		166,161.26			30-Jun-2005		5.900%		WI - 62.83%		Paid Off - 360		01-May-2005
112034509 1					166,161.26			30-Jun-2005		5.900%		WI - 62.83%		Paid Off - 360		01-May-2005
112201868 1			67,286.00		67,213.73			24-Jun-2005		9.100%		CA - 24.47%		Paid Off - 360		01-May-2005
112201868 1					67,213.73			24-Jun-2005		9.100%		CA - 24.47%		Paid Off - 360		01-May-2005
112261144 1			129,200.00		128,979.06			07-Jul-2005		6.800%		FL - 85.00%		Paid Off - 360		01-May-2005
112261144 1					128,979.06			07-Jul-2005		6.800%		FL - 85.00%		Paid Off - 360		01-May-2005
112321120 1			86,700.00		86,595.65			06-Jul-2005		8.550%		NC - 89.38%		Paid Off - 360		01-May-2005
112321120 1					86,595.65			06-Jul-2005		8.550%		NC - 89.38%		Paid Off - 360		01-May-2005
112566641 1			276,250.00		275,968.11			08-Jul-2005		9.350%		NY - 82.46%		Paid Off - 360		01-May-2005
112566641 1					275,968.11			08-Jul-2005		9.350%		NY - 82.46%		Paid Off - 360		01-May-2005
112647086 2			499,999.00		499,577.85			21-Jun-2005		10.250%		CA - 72.46%		Paid Off - 360		01-May-2005
112647086 2					499,577.85			21-Jun-2005		10.250%		CA - 72.46%		Paid Off - 360		01-May-2005
112726427 1			170,000.00		169,824.88			15-Jun-2005		9.300%		RI - 72.34%		Paid Off - 360		01-May-2005
112726427 1					169,824.88			15-Jun-2005		9.300%		RI - 72.34%		Paid Off - 360		01-May-2005
112730403 1			217,600.00		217,205.49			07-Jul-2005		6.500%		NJ - 85.33%		Paid Off - 360		01-May-2005
112730403 1					217,205.49			07-Jul-2005		6.500%		NJ - 85.33%		Paid Off - 360		01-May-2005
112796545 1			152,100.00		151,922.51			01-Jul-2005		8.700%		AZ - 89.74%		Paid Off - 360		01-May-2005
112796545 1					151,922.51			01-Jul-2005		8.700%		AZ - 89.74%		Paid Off - 360		01-May-2005
112996764 1			272,000.00		271,430.66			13-Jun-2005		5.750%		MA - 63.26%		Paid Off - 360		01-May-2005
112996764 1					271,430.66			13-Jun-2005		5.750%		MA - 63.26%		Paid Off - 360		01-May-2005
113038202 1			319,266.00		318,809.30			05-Jul-2005		7.700%		CA - 40.41%		Paid Off - 360		01-May-2005
113038202 1					318,809.30			05-Jul-2005		7.700%		CA - 40.41%		Paid Off - 360		01-May-2005
113093207 1			118,000.00		117,840.80			15-Jun-2005		7.990%		UT - 71.52%		Paid Off - 360		01-May-2005
113093207 1					117,840.80			15-Jun-2005		7.990%		UT - 71.52%		Paid Off - 360		01-May-2005
113102362 2			441,000.00		440,573.52			14-Jun-2005		9.600%		CA - 78.05%		Paid Off - 360		01-May-2005
113102362 2					440,573.52			14-Jun-2005		9.600%		CA - 78.05%		Paid Off - 360		01-May-2005
113143069 1			112,000.00		111,898.34			13-Jun-2005		9.900%		AL - 80.00%		Paid Off - 360		01-May-2005
113143069 1					111,898.34			13-Jun-2005		9.900%		AL - 80.00%		Paid Off - 360		01-May-2005
113150007 1			148,000.00		147,810.59			23-Jun-2005		8.250%		CA - 58.04%		Paid Off - 360		01-May-2005
113150007 1					147,810.59			23-Jun-2005		8.250%		CA - 58.04%		Paid Off - 360		01-May-2005
113160261 1			310,250.00		310,025.30			05-Jul-2005		10.950%		CA - 85.00%		Paid Off - 360		01-May-2005
113160261 1					310,025.30			05-Jul-2005		10.950%		CA - 85.00%		Paid Off - 360		01-May-2005
113255301 1			272,000.00		271,530.30			24-Jun-2005		6.750%		MA - 73.51%		Paid Off - 360		01-May-2005
113255301 1					271,530.30			24-Jun-2005		6.750%		MA - 73.51%		Paid Off - 360		01-May-2005
113284244 1			175,500.00		175,263.21			07-Jul-2005		7.990%		FL - 84.38%		Paid Off - 360		01-May-2005
113284244 1					175,263.21			07-Jul-2005		7.990%		FL - 84.38%		Paid Off - 360		01-May-2005
113299507 1			96,045.00		95,901.98			30-Jun-2005		7.500%		CA - 44.10%		Paid Off - 360		01-May-2005
113299507 1					95,901.98			30-Jun-2005		7.500%		CA - 44.10%		Paid Off - 360		01-May-2005
113312003 1			283,436.00		282,927.11			17-Jun-2005		6.550%		CA - 55.04%		Paid Off - 360		01-May-2005
113312003 1					282,927.11			17-Jun-2005		6.550%		CA - 55.04%		Paid Off - 360		01-May-2005
113417828 2			665,000.00		664,474.84			30-Jun-2005		10.550%		CA - 78.24%		Paid Off - 360		01-May-2005
113417828 2					664,474.84			30-Jun-2005		10.550%		CA - 78.24%		Paid Off - 360		01-May-2005
113641682 2			401,000.00		400,853.87			08-Jul-2005		10.900%		CA - 61.32%		Paid Off - 360		01-Jun-2005
113641682 2					400,853.87			08-Jul-2005		10.900%		CA - 61.32%		Paid Off - 360		01-Jun-2005
113800304 1			307,000.00		306,630.52			23-Jun-2005		8.550%		NY - 49.92%		Paid Off - 360		01-May-2005
113800304 1					306,630.52			23-Jun-2005		8.550%		NY - 49.92%		Paid Off - 360		01-May-2005
113869804 1			112,000.00		111,867.95			05-Jul-2005		8.650%		SC - 74.67%		Paid Off - 360		01-May-2005
113869804 1					111,867.95			05-Jul-2005		8.650%		SC - 74.67%		Paid Off - 360		01-May-2005
113954028 1			75,000.00		74,940.12			13-Jun-2005		10.500%		CT - 60.00%		Paid Off - 360		01-May-2005
113954028 1					74,940.12					10.500%		CT - 60.00%		Paid Off - 360


Page 21 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan Number			Original							Current		State &		Type Prepayment

&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date

114077969 1			346,500.00		346,354.69			30-Jun-2005		10.250%		IL - 90.00%		Paid Off - 360		01-Jun-2005
			346,500.00

114213523 1			139,400.00		139,286.29			28-Jun-2005		10.400%		IL - 85.00%		Paid Off - 360		01-May-2005
114213523 1					139,286.29			28-Jun-2005		10.400%		IL - 85.00%		Paid Off - 360		01-May-2005
114421068 1			163,000.00		162,712.97			17-Jun-2005		6.650%		FL - 89.56%		Paid Off - 360		01-May-2005
114421068 1					162,712.97			17-Jun-2005		6.650%		FL - 89.56%		Paid Off - 360		01-May-2005
114427800 1			279,000.00		278,469.15			01-Jul-2005		6.250%		MA - 89.68%		Paid Off - 360		01-May-2005
114427800 1					278,469.15			01-Jul-2005		6.250%		MA - 89.68%		Paid Off - 360		01-May-2005
114458888 1			274,720.00		274,245.61			07-Jul-2005		6.750%		CA - 79.86%		Paid Off - 360		01-May-2005
114458888 1					274,245.61			07-Jul-2005		6.750%		CA - 79.86%		Paid Off - 360		01-May-2005
114531304 1			174,000.00		173,845.08			08-Jul-2005		9.990%		IL - 75.00%		Paid Off - 360		01-May-2005
114531304 1					173,845.08			08-Jul-2005		9.990%		IL - 75.00%		Paid Off - 360		01-May-2005
114582844 1			242,250.00		242,034.31			01-Jul-2005		9.990%		MD - 85.00%		Paid Off - 360		01-May-2005
114582844 1					242,034.31			01-Jul-2005		9.990%		MD - 85.00%		Paid Off - 360		01-May-2005
114827504 1			283,253.00		282,822.75			13-Jun-2005		7.400%		CA - 76.56%		Paid Off - 360		01-May-2005
114827504 1					282,822.75			13-Jun-2005		7.400%		CA - 76.56%		Paid Off - 360		01-May-2005
114886849 1			273,500.00		273,306.96			24-Jun-2005		7.750%		GA - 82.38%		Paid Off - 360		01-Jun-2005
114886849 1					273,306.96			24-Jun-2005		7.750%		GA - 82.38%		Paid Off - 360		01-Jun-2005
115029480 1			97,500.00		97,446.63			16-Jun-2005		8.990%		MD - 75.00%		Paid Off - 360		01-Jun-2005
115029480 1					97,446.63			16-Jun-2005		8.990%		MD - 75.00%		Paid Off - 360		01-Jun-2005
115280448 1			108,000.00		107,899.48			29-Jun-2005		6.350%		MA - 38.30%		Paid Off - 360		01-Jun-2005
115280448 1					107,899.48			29-Jun-2005		6.350%		MA - 38.30%		Paid Off - 360		01-Jun-2005
115346363 2			443,840.00		443,653.87			20-Jun-2005		10.250%		AZ - 82.50%		Paid Off - 360		01-Jun-2005
115346363 2					443,653.87			20-Jun-2005		10.250%		AZ - 82.50%		Paid Off - 360		01-Jun-2005
115435661 1			352,750.00		352,567.12			27-Jun-2005		9.250%		CA - 85.00%		Paid Off - 360		01-Jun-2005
115435661 1					352,567.12			27-Jun-2005		9.250%		CA - 85.00%		Paid Off - 360		01-Jun-2005
115574923 1			62,771.00		62,771.00			21-Jun-2005		9.990%		CA - 9.49%		Paid Off - 360		01-Jun-2005
115574923 1					62,771.00			21-Jun-2005		9.990%		CA - 9.49%		Paid Off - 360		01-Jun-2005
115643223 1			93,750.00		93,706.72			30-Jun-2005		9.800%		WI - 75.00%		Paid Off - 360		01-Jun-2005
115643223 1					93,706.72			30-Jun-2005		9.800%		WI - 75.00%		Paid Off - 360		01-Jun-2005
115689663 1			131,250.00		131,190.68			30-Jun-2005		9.900%		NJ - 75.00%		Paid Off - 360		01-Jun-2005
115689663 1					131,190.68			30-Jun-2005		9.900%		NJ - 75.00%		Paid Off - 360		01-Jun-2005
115909145 1			323,000.00		322,656.78			30-Jun-2005		7.150%		NJ - 85.00%		Paid Off - 360		01-Jun-2005
115909145 1					322,656.78			30-Jun-2005		7.150%		NJ - 85.00%		Paid Off - 360		01-Jun-2005
116082124 1			165,000.00		164,876.30			08-Jul-2005		7.450%		MD - 94.29%		Paid Off - 360		01-Jun-2005
116082124 1					164,876.30			08-Jul-2005		7.450%		MD - 94.29%		Paid Off - 360		01-Jun-2005
116100967 1			103,500.00		103,500.00			24-Jun-2005		11.250%		LA - 90.00%		Paid Off - 360		01-Jun-2005
116100967 1					103,500.00			24-Jun-2005		11.250%		LA - 90.00%		Paid Off - 360		01-Jun-2005
116497967 1			245,000.00		#######			29-Jun-2005		7.450%		CA - 60.64%		Paid Off - 360		01-Jun-2005
116497967 1								29-Jun-2005		7.450%		CA - 60.64%		Paid Off - 360		01-Jun-2005
116510165 2			119,000.00		119,000.00			24-Jun-2005		7.750%		FL - 84.10%		Paid Off - 360		01-Jun-2005
116510165 2					119,000.00			24-Jun-2005		7.750%		FL - 84.10%		Paid Off - 360		01-Jun-2005
116529389 2			360,000.00		360,000.00			24-Jun-2005		8.450%		NY - 88.02%		Paid Off - 360		01-Jun-2005
116529389 2					360,000.00			24-Jun-2005		8.450%		NY - 88.02%		Paid Off - 360		01-Jun-2005
116574849 1			135,000.00		134,924.70			07-Jul-2005		8.900%		MD - 84.91%		Paid Off - 360		01-Jun-2005
116574849 1					134,924.70			07-Jul-2005		8.900%		MD - 84.91%		Paid Off - 360		01-Jun-2005
116582685 1			127,889.00		127,889.00			07-Jul-2005		7.700%		AZ - 79.93%		Paid Off - 360		01-Jun-2005
116582685 1					127,889.00			07-Jul-2005		7.700%		AZ - 79.93%		Paid Off - 360		01-Jun-2005
116613308 1			242,000.00		241,999.42			05-Jul-2005		7.450%		NY - 76.83%		Paid Off - 360		01-Jun-2005
116613308 1					241,999.42			05-Jul-2005		7.450%		NY - 76.83%		Paid Off - 360		01-Jun-2005
116841305 1			273,600.00		273,434.25			28-Jun-2005		8.500%		MD - 90.00%		Paid Off - 360		01-Jun-2005
116841305 1					273,434.25			28-Jun-2005		8.500%		MD - 90.00%		Paid Off - 360		01-Jun-2005
117176446 2			526,100.00		526,100.00			08-Jul-2005		7.150%		TN - 72.47%		Paid Off - 360		01-Jun-2005
117176446 2					526,100.00			08-Jul-2005		7.150%		TN - 72.47%		Paid Off - 360		01-Jun-2005
117485763 1			332,688.00		332,688.00			06-Jul-2005		7.990%		CA - 89.43%		Paid Off - 360		01-Jun-2005
117485763 1					332,688.00			06-Jul-2005		7.990%		CA - 89.43%		Paid Off - 360		01-Jun-2005
117626424 2			428,000.00		427,748.61			30-Jun-2005		8.650%		IL - 79.26%		Paid Off - 360		01-Jun-2005
117626424 2					427,748.61			30-Jun-2005		8.650%		IL - 79.26%		Paid Off - 360		01-Jun-2005
118833565 1			60,000.00		60,000.00			30-Jun-2005		9.990%		TN - 83.92%		Paid Off - 360		01-Jul-2005
118833565 1					60,000.00			30-Jun-2005		9.990%		TN - 83.92%		Paid Off - 360		01-Jul-2005
119106441 1			186,620.00		186,620.00			06-Jul-2005		7.600%		MD - 86.02%		Paid Off - 360		01-Jul-2005
119106441 1					186,620.00			06-Jul-2005		7.600%		MD - 86.02%		Paid Off - 360		01-Jul-2005
120104948 1			225,250.00		225,250.00			28-Jun-2005		11.990%		FL - 85.00%		Paid Off - 360		01-Jul-2005
120104948 1					225,250.00			28-Jun-2005		11.990%		FL - 85.00%		Paid Off - 360		01-Jul-2005
109575969 1			65,000.00		64,910.68			20-Jun-2005		7.900%		WA - 27.08%		Repur/Subs - 360		01-May-2005
109575969 1					64,910.68			20-Jun-2005		7.900%		WA - 27.08%		Repur/Subs - 360		01-May-2005
112765060 1			72,000.00		71,920.86			16-Jun-2005		8.990%		MO - 75.00%		Repur/Subs - 360		01-May-2005
112765060 1					71,920.86			16-Jun-2005		8.990%		MO - 75.00%		Repur/Subs - 360		01-May-2005
113666242 2			462,400.00		461,783.68			20-Jun-2005		8.050%		TX - 85.00%		Repur/Subs - 360		01-May-2005
113666242 2					461,783.68			20-Jun-2005		8.050%		TX - 85.00%		Repur/Subs - 360		01-May-2005
117437327 1			326,064.00		326,064.00			21-Jun-2005		7.400%		CA - 90.00%		Repur/Subs - 360		01-Jun-2005
117437327 1					326,064.00			21-Jun-2005		7.400%		CA - 90.00%		Repur/Subs - 360		01-Jun-2005
117692384 1			93,600.00		93,600.00			20-Jun-2005		8.250%		WI - 80.00%		Repur/Subs - 360		01-Jun-2005
117692384 1					93,600.00			20-Jun-2005		8.250%		WI - 80.00%		Repur/Subs - 360		01-Jun-2005
118476423 1			412,500.00		412,500.00			20-Jun-2005		6.990%		NY - 82.50%		Repur/Subs - 360		01-Jul-2005
118476423 1					412,500.00					6.990%		NY - 82.50%		Repur/Subs - 360


Page 22 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan Number			Original							Current		State &		Type Prepayment

&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date

120863022 1			65,000.00		65,000.00			20-Jun-2005		10.800%		NY - 54.17%		Repur/Subs - 360		01-Jul-2005
			65,000.00

120982509 1			92,000.00		92,000.00			20-Jun-2005		8.990%		CA - 50.55%		Repur/Subs - 360		01-Jul-2005
120982509 1					92,000.00			20-Jun-2005		8.990%		CA - 50.55%		Repur/Subs - 360		01-Jul-2005


TOTAL			26,821,874.00		26,769,913.48
TOTAL


Page 23 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Realized Loss Report

COLLATERAL REALIZED LOSSES



											Group 2		Group 1		Total


Current
Current



Number of Loans Liquidated										0		0		0
Collateral Principal Realized Loss/(Gain) Amount										0.00		0.00		0.00
Collateral Interest Realized Loss/(Gain) Amount										0.00		0.00		0.00
Net Liquidation Proceeds										0.00		0.00		0.00

Cumulative
Cumulative



Number of Loans Liquidated										0		0		0
Collateral Realized Loss/(Gain) Amount										0.00		0.00		0.00
Net Liquidation Proceeds										0.00		0.00		0.00










Page 24 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution


DEFAULT SPEEDS



											Group 2		Group 1		Total



MDR										0.00%		0.00%		0.00%
3 Months Avg MDR										0.00%		0.00%		0.00%
12 Months Avg MDR										0.00%		0.00%		0.00%
Avg MDR Since Cut-off										0.00%		0.00%		0.00%


CDR										0.00%		0.00%		0.00%
3 Months Avg CDR										0.00%		0.00%		0.00%
12 Months Avg CDR										0.00%		0.00%		0.00%
Avg CDR Since Cut-off										0.00%		0.00%		0.00%


SDA										0.00%		0.00%		0.00%
3 Months Avg SDA Approximation										0.00%		0.00%		0.00%
12 Months Avg SDA Approximation										0.00%		0.00%		0.00%
Avg SDA Since Cut-off Approximation										0.00%		0.00%		0.00%


Loss Severity Approximation for Current Period										0.00%		0.00%		0.00%
3 Months Avg Loss Severity Approximation										0.00%		0.00%		0.00%
12 Months Avg Loss Severity Approximation										0.00%		0.00%		0.00%
Avg Loss Severity Approximation Since Cut-off										0.00%		0.00%		0.00%












Page 25 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution





COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
	Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)



	Conditional Default Rate (CDR): 1-((1-MDR)^12)

	SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))

	Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)(1-MDRn+1)...*(1-MDRm)]^(1/months in period n,m)
	Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

	Average SDA Approximation over period between the nth month and mth month:
	AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))

	Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)
	Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

	Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)

	Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
	Dates correspond to distribution dates.




Page 26 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Realized Loss Detail Report
Loan Number			Current		State &				Prior		Realized				Cumulative
															Cumulative
&		Loan	Note		LTV at		Original		Principal		Loss/(Gain)		Realized		Realized

Loan Group		Status	Rate		Origination		Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)
Loan Group		Status	Rate		Origination		Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)




TOTAL



Page 27 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Triggers and Adj. Cert. Report
TRIGGER EVENTS
TRIGGER EVENTS
										Group 2		Group 1		Total
						Does a Trigger Event Exist? (0=No,1=Yes)								0
						Has a Stepdown Date Occurred? (0=No,1=Yes)								0
						Balances 60+ days includes REO, BKC and FCL								616,081.34
						Delinquency Percentage								0.0316%
						Balance of Mezzanine and C Class								244,000,000.00
						Ending Pool Balance								1,948,274,563.78
						Credit Enhancement Percentage (Current Period)								12.5239%
						Credit Enhancement Percentage (Prior Period)								12.3440%
						Does a Sequential Trigger Exist? (0=No,1=Yes)								0



ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK



ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
										Group 2		Group 1		Total
Current LIBOR Rate														3.314380%
Next LIBOR Rate														3.460000%




Page 28 of 29
Ameriquest Mortgage Securities, Inc. 2005-R4

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-R4

July 25, 2005 Distribution
Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

										Next Pass Through Rate			NET WAC Shortfall CarryOver		NET WAC Shortfall Paid
CLASS

			A-1A							3.69%			$0.00		$0.00
										3.69%			$0.00		$0.00
			A-1B							3.74%			$0.00		$0.00
										3.74%			$0.00		$0.00
			A-2A							3.54%			$0.00		$0.00
										3.54%			$0.00		$0.00
			A-2B							3.60%			$0.00		$0.00
										3.60%			$0.00		$0.00
			A-2C							3.68%			$0.00		$0.00
										3.68%			$0.00		$0.00
			A-2D							3.78%			$0.00		$0.00
										3.78%			$0.00		$0.00
			M-1							3.89%			$0.00		$0.00
										3.89%			$0.00		$0.00
			M-2							3.91%			$0.00		$0.00
										3.91%			$0.00		$0.00
			M-3							3.94%			$0.00		$0.00
										3.94%			$0.00		$0.00
			M-4							4.09%			$0.00		$0.00
										4.09%			$0.00		$0.00
			M-5							4.11%			$0.00		$0.00
										4.11%			$0.00		$0.00
			M-6							4.13%			$0.00		$0.00
										4.13%			$0.00		$0.00
			M-7							4.66%			$0.00		$0.00
										4.66%			$0.00		$0.00
			M-8							4.76%			$0.00		$0.00
										4.76%			$0.00		$0.00
			M-9							5.21%			$0.00		$0.00
										5.21%			$0.00		$0.00
			M-10							6.21%			$0.00		$0.00
										6.21%			$0.00		$0.00
			M-11							6.21%			$0.00		$0.00
										6.21%			$0.00		$0.00
			CE							0.00%			$0.00		$0.00
										0.00%			$0.00		$0.00
			P							0.00%			$0.00		$0.00
										0.00%			$0.00		$0.00
			R							0.00%			$0.00		$0.00
										0.00%			$0.00		$0.00
			SWAP-IO							0.00%			$0.00		$0.00
										0.00%			$0.00		$0.00






Page 29 of 29

Asset-Backed Pass-Through Certificates, Series 2005-R4 8-K