Six channel Surround Amp

[Rainwulf]

I am in the process of designing a 6 channel amp to replace the rather dodgy system on my computer.
So far, i have 5 LM3875 modules, and a kit built 200 watt amp module to drive the subwoofer.
The process so far.

The Rectifiers





The 6 channel volume control.
Finding a way to control 6 channels at the same time is hard without resorting to digital means.
I have used 3 alps log pots joined together with some gears to control all 6 channels at the same time.



LM3975 module.


More pictures as i slowly build it.


Transformers

2 18volt x 2 transformers for the 5 LM3875 modules, one 40volt x 2 transformer for the 200 watt sub amp, and a 13.8 volt one to drive the misc stuff in the amp, including soft turn on, fan, headphone amp and anything else.

[pacificblue]

Originally posted by Rainwulf
The Rectifiers

Judging from the heatsinks you must be expecting some tough working conditions.

Originally posted by Rainwulf
The 6 channel volume control.
Finding a way to control 6 channels at the same time is hard without resorting to digital means.
I have used 3 alps log pots joined together with some gears to control all 6 channels at the same time.

For your next project you could have a look here. They have 6-channel pot with motor for optional remote control. There is a typo in the list. The real price is 20,30 $.

[Rainwulf]

That is really cool, thanks for that. I have inquired about obtaining one for this project.