QuickLinks -- Click here to rapidly navigate through this document

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): February 23, 2005

ULTIMATE ELECTRONICS, INC.
(Exact name of registrant as specified in its charter)

Delaware		000-22532		84-0585211
(State or Other Jurisdiction of Incorporation or Organization)		(Commission File Number)		(I.R.S. Employer Identification No.)

321 West 84th Avenue, Suite A, Thornton, Colorado 80260
(Address of principal executive offices, zip code)

Registrant's telephone number, including area code: (303) 412-2500

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):

o: Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o: Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o: Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o: Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 3.01 NOTICE OF DELISTING OR FAILURE TO SATISFY A CONTINUED LISTING RULE OR STANDARD.

On February 23, 2005, Ultimate Electronics, Inc. (Nasdaq: ULTEQ) received notification from The Nasdaq Stock Market ("Nasdaq") that the Nasdaq Listing Qualifications Panel (the "Panel") has denied the Company's request for continued inclusion and has determined to delist the Company's securities from Nasdaq, effective with the open of business on February 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.

		ULTIMATE ELECTRONICS, INC. (Registrant)
Date: February 24, 2005		By:		/s/ DAVID A. CARTER David A. Carter, Senior Vice President—Finance and Chief Financial Officer

QuickLinks

ITEM 3.01 NOTICE OF DELISTING OR FAILURE TO SATISFY A CONTINUED LISTING RULE OR STANDARD.

SIGNATURES

ULTIMATE ELECTRONICS INC 8-K