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Old 17th July 2011, 10:35 PM   #1
diyAudio Member
Join Date: Jun 2007
Default Modding cheap 5.1 surround decoder from eBay


Ive bought a fairly cheap 5.1 surround decoder on eBay. It has a separate analog outputs for SW/C, FL/FR and SL/SR. It has two optical S/PDIF inputs, one coax digital input, and an analog AUX input. A pushbutton allows to select the desired input. The casing reads 5.1 AUDIO GEAR Digital sound decoder".

As you see from the picture Ive taken the board out of the casing. I am planning to fit the board with power supply in a larger chassis.

Click the image to open in full size.

As for the decoding itself, the decoder seems to handle all promised digital formats well. I successfully tested it with AC3, DTS, and just stereo signals, both through the digital inputs and the analog AUX input.

Does anyone have any experience modding the board to improve sound quality? I found this HD Audio Rush 5.1 Decoder Review page by dr Lux but his box is a previous version of my decoder.

Any advice on replacing the capacitors? The board has a couple of 220uF 16V and approx 10 each of 100uF 16v/10uF 16V

Click the image to open in full size.

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