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UNITED STATES SECURITIES AND EXCHANGE COMMISSION


Washington, D.C. 20549





Form 10-K/ A


Amendment No. 1


|           |  |                                                         |                                                |                                           
|---------- |  | ------------------------------------------------------- | ---------------------------------------------- | ------------------------------------------
|(Mark One) |  |                                                        
|þ          |  |                                                         | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15     | (d) OF THE SECURITIES EXCHANGE ACT OF 1934
|          
|           |  | For the fiscal year ended December 31, 2004            
|          
|or        
|          
|o          |  |                                                         | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 | (d) OF THE SECURITIES EXCHANGE ACT OF 1934
|          
|           |  | For the transition period from           to           .

Commission File Number 0-26660





ESS Technology, Inc.


(Exact name of Registrant as specified in its charter)


|                                                                                     |  |                                         
|------------------------------------------------------------------------------------ |  | ----------------------------------------
|California                                                                           |  | 94-2928582                              
|(State or other jurisdiction of
    incorporation or organization)                   |  | (I.R.S. Employer
    Identification No.)
|48401 Fremont Blvd.,
    Fremont, California(Address of principal executive offices) |  | 94538(Zip Code)                         

Registrants telephone number, including area code:


(510) 492-1088


Securities registered pursuant to Section 12(b) of the
Act:


None


Securities registered pursuant to Section 12(g) of the
Act:


Common Stock, no par value


(Title of Class)


þ o


o


þ o














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EXPLANATORY NOTE








|         |                  
|-------- | -----------------
|Item 9B. | Other Information





|         |                                           
|-------- | ------------------------------------------
|Item 15. | Exhibits and Financial Statement Schedules

Exhibits




|        |    |     |               |                                                                                                        
|------- | -- | --- | ------------- | -------------------------------------------------------------------------------------------------------
|Exhibit |    |     |              
|Number  |    |     | Exhibit Title
|        |    |     |              
|        | 10 | .32 |               | Retention and Incentive Agreement by and between ESS Technology,
    Inc. and James Boyd.              
|        | 31 | .1  |               | Certification of Chief Executive Officer Pursuant to
    Section 302 of the Sarbanes-Oxley Act of 2002.
|        | 31 | .2  |               | Certification of Chief Financial Officer Pursuant to
    Section 302 of the Sarbanes-Oxley Act of 2002.



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SIGNATURE






| |                     
| | --------------------
| | ESS TECHNOLOGY, INC.
| | (Registrant)        



| |     |                    
| | --- | -------------------
| | By: | /s/ ROBERT L. BLAIR

| |                                      
| | -------------------------------------
| |                                      
| | Robert L. Blair                      
| | President and Chief Executive Officer





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INDEX TO EXHIBITS


|        |    |     |               |                                                                                                        
|------- | -- | --- | ------------- | -------------------------------------------------------------------------------------------------------
|Exhibit |    |     |              
|Number  |    |     | Exhibit Title
|        |    |     |              
|        | 10 | .32 |               | Retention and Incentive Agreement by and between ESS Technology,
    Inc. and James Boyd.              
|        | 31 | .1  |               | Certification of Chief Executive Officer Pursuant to
    Section 302 of the Sarbanes-Oxley Act of 2002.
|        | 31 | .2  |               | Certification of Chief Financial Officer Pursuant to
    Section 302 of the Sarbanes-Oxley Act of 2002.