SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-2-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND
AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

(Amendment No. 7)¹

ESS Technology, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

269151106

(CUSIP Number)

Riley Investment Management LLC

Attn: Bryant R. Riley

11100 Santa Monica Blvd.

Suite 810

Los Angeles, CA 90025

(310) 966-1445

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

December 31, 2007

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box: ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7(b) for other parties to whom copies are to be sent.

(Continued on following pages)

———————

¹The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 269151106	13D	Page 2


1	NAME OF REPORTING PERSON S.S. OR IRS. IDENTIFICATION NO. OF ABOVE PERSON Riley Investment Partners Master Fund, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X]
3	SEC USE ONLY
4	SOURCE OF FUNDS* WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ]
6	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands
NUMBER OF SHARES		7	SOLE VOTING POWER 135,948
BENEFICIALLY OWNED BY		8	SHARED VOTING POWER -0-
EACH REPORTING		9	SOLE DISPOSITIVE POWER 135,948
PERSON WITH		10	SHARED DISPOSITIVE POWER -0-
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 135,948
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES SHARES* [ ]
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .4%¹
14	TYPE OF REPORTING PERSON* PN

———————

Based on 35,547,323 shares of common stock of ESS Technology, Inc. (the “Issuer”) outstanding at November 6, 2007, as reported in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2007 filed with the Securities and Exchange Commission on November 9, 2007.


CUSIP No. 269151106	13D	Page 3


1	NAME OF REPORTING PERSON S.S. OR IRS. IDENTIFICATION NO. OF ABOVE PERSON Riley Investment Management LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X]
3	SEC USE ONLY
4	SOURCE OF FUNDS* AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ]
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES		7	SOLE VOTING POWER 135,948¹
BENEFICIALLY OWNED BY		8	SHARED VOTING POWER 1,202,696²
EACH REPORTING		9	SOLE DISPOSITIVE POWER 135,948¹
PERSON WITH		10	SHARED DISPOSITIVE POWER 1,202,696²
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,146,644²
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES SHARES* [x]
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.2%²
14	TYPE OF REPORTING PERSON* IA

———————

Because Riley Investment Management LLC has sole investment and voting power over 135,948 shares of Common Stock held by Riley Investment Partners Master Fund, L.P., Riley Investment Management LLC may be deemed to have beneficial ownership of these shares.


CUSIP No. 269151106	13D	Page 4


1	NAME OF REPORTING PERSON S.S. OR IRS. IDENTIFICATION NO. OF ABOVE PERSON B. Riley & Co., LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X]
3	SEC USE ONLY
4	SOURCE OF FUNDS* AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ]
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES		7	SOLE VOTING POWER -0-
BENEFICIALLY OWNED BY		8	SHARED VOTING POWER 135,000¹
EACH REPORTING		9	SOLE DISPOSITIVE POWER -0-
PERSON WITH		10	SHARED DISPOSITIVE POWER 135,000¹
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 135,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES SHARES* [ ]
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .4%
14	TYPE OF REPORTING PERSON* BD

———————

B. Riley & Co., LLC has shared voting and dispositive power over 135,000 shares of Common Stock held in a managed account with which it is indirectly affiliated.


CUSIP No. 269151106	13D	Page 5


1	NAME OF REPORTING PERSON S.S. OR IRS. IDENTIFICATION NO. OF ABOVE PERSON Bryant R. Riley
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X]
3	SEC USE ONLY
4	SOURCE OF FUNDS* AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [ ]
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES		7	SOLE VOTING POWER 135,948¹
BENEFICIALLY OWNED BY		8	SHARED VOTING POWER 1,337,696²
EACH REPORTING		9	SOLE DISPOSITIVE POWER 135,948¹
PERSON WITH		10	SHARED DISPOSITIVE POWER 1,337,696²
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,281,644²
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES SHARES* [x]
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.6%
14	TYPE OF REPORTING PERSON* IN

———————

Because Riley Investment Management LLC has sole voting and investment power over Riley Investment Partners Master Fund, L.P.’s security holdings and Mr. Riley, in his role as the sole manager of Riley Investment Management LLC, controls its voting and investment decisions, each of Riley Investment Partners Master Fund, L.P., Riley Investment Management LLC, and Mr. Riley may be deemed to have beneficial ownership of the 135,948 shares of Common Stock held by Riley Investment Partners Master Fund, L.P.

Riley Investment Management LLC has shared voting and dispositive power over 1,202,696 shares of Common Stock held by its investment advisory clients, 1,010,696 of which are held by investment advisory accounts indirectly affiliated with Bryant Riley or Riley Investment Partners Master Fund, L.P. The Reporting Persons disclaim beneficial ownership of the non-affiliated shares. B. Riley & Co., LLC has shared voting and dispositive power over 135,000 shares of Common Stock held in a managed account with which it is indirectly affiliated. Mr. Riley is the Chairman of B. Riley & Co., LLC.


CUSIP No. 269151106	13D	Page 6

Item 2.

Identity and Background

Item 2 as previously filed is amended to add the following:

(a)

(i) B. Riley & Co., LLC (Delaware limited liability company)

(b)

(i)

11100 Santa Monica Blvd.

Suite 800

Los Angeles, CA 90025

(c)

Mr. Riley is the indirect owner and Chairman of B. Riley & Co., LLC (“BRC”), a FINRA broker-dealer.

Item 5.

Interest in Securities of the Issuer

(c)

Since the Reporting Persons’ last filing, the transactions in Common Stock set forth on Exhibit A have been effected. In addition, in the ordinary course of business, BRC may effect transactions in connection with its market making activities, as well as for customer transactions.

(e)

November 21, 2007

Item 7.

Material to be filed as Exhibits

EXHIBIT A:

Certain Transactions in Common Stock


CUSIP No. 269151106	13D	Page 7

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: January 3, 2008


		Riley Investment Partners Master Fund, L.P.
			By: Riley Investment Management LLC, its General
			Partner
		By:	/s/ Bryant R. Riley
			Bryant R. Riley, Managing Member


		Riley Investment Management LLC


		By:	/s/ Bryant R. Riley
			Bryant R. Riley, Managing Member
		B. Riley & Co., LLC


		By:	/s/ Bryant R. Riley
			Bryant R. Riley, Chairman


		By:	/s/ Bryant R. Riley
			Bryant R. Riley


CUSIP No. 269151106	13D	Page 8

Exhibit A

Certain Transactions in Common Stock


Master	Trans Code	Quantity	Price	Trade Date
	SL	(2,063)	1.5	11/14/2007
	SL	(77)	1.5	11/16/2007
	SL	(389,058)	1.4046	11/20/2007
	SL	(41,303)	1.4	11/21/2007
	SL	(3,125)	1.4537	11/26/2007
	SL	(45,986)	1.4808	11/27/2007
	SL	(64,030)	1.5009	11/28/2007
	SL	(16,069)	1.52	12/6/2007
	SL	(21,700)	1.52	12/7/2007
	SL	(2,215)	1.52	12/10/2007


Investment Advisory Clients	Trans Code	Quantity	Price	Trade Date
	SL	(1,170)	1.5	11/14/2007
	SL	(2,115)	1.5	11/14/2007
	SL	(44)	1.5	11/16/2007
	SL	(79)	1.5	11/16/2007
	BY	300,000	1.4	11/20/2007
	SL	(135,000)	1.35	12/17/2007
	SL	(108,000)	1.3	12/31/2007


Managed Account	Trans Code	Quantity	Price	Trade Date
	BY	135,000	1.35	12/17/2007

ESS TECHNOLOGY INC SC 13D/A