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Old 7th April 2006, 03:10 PM   #1
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Default Completed Multichannel High End Preamp

Longtime ago i decided to build a pre using PGAs as pots with input output buffers, QS5.1 which converts a stereo input to 5.1, LCD/VFD , USB DAC and good poweramps.
Initially many guys here showed there interest in contributing but eventually it end up with a friend of mine in phillipines and myself.
Project was completed back in february, and my friend put the same as thesis work for his graduation and the efforts that was put in won him best project of the year.
We thought it was time that we shared the details of the project with the people of the board, as it may serve as a good help for those who want to take on an ambitious project like this one.
Here is the PIC of the AMP....
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Old 7th April 2006, 03:17 PM   #2
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and here is the top view on the amp...
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Old 7th April 2006, 03:21 PM   #3
Khron is offline Khron  Romania
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Is there any chance we'll ever get a peek at the schematic? I'm especially intrigued by the application of that QS5.1 chip....
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Old 7th April 2006, 03:24 PM   #4
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we did post the schematics here a while ago, but the final designs include, temperature sensor, fan control, etc...
but i ll definitely post schematics....
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Old 7th April 2006, 03:28 PM   #5
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heres a view of USB DAC, which is PCM2706
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Old 29th April 2006, 08:16 PM   #6
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more more?!
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Old 30th April 2006, 03:48 AM   #7
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Default and now the menu

and heres is the view of the VFD showing menu...
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Old 30th April 2006, 03:50 AM   #8
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here is another option of the menu system..
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Old 30th April 2006, 03:59 AM   #9
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Default power amps

heres the view of power amps which are as follows:
LM4780 for front left and right
LM4780 for rear left and right
LM4780 bridged for Sub woofer
LM3886 for center speaker
and beilive me they sound wonderful, good bass quality with good high freq and an excellent midrange.
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Old 6th May 2006, 04:25 AM   #10
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A view of PGA2310, and OPA627 SMD board with decoupling caps
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