JVS adapter pinout info?

I all, I am hoping to use a JVS adapter as a sort of audio amplifier for putting a console into a cab. It's the same adapter as shown here:

http://img124.imageshack.us/img124/982/p1000799b.th.jpg

I was hoping to use the audio rca input and plug the game into that, then take the sound out through jamma, I hope. Not sure about where the power comes from. Would the jamma connector provide the power for it, or would I need to input power from my power supply to it. And if so, where?

Why waste an IO when all you need is an amplifier?

This is what I used when jamma-tizing my NES and it works great:

http://www.electronics123.com/s.nl/it.A/id.2136/.f?sc=8&category=33

Agreed. What you have proposed is a ridiculous idea in my opinion.

I suggest buying an amplifier similar to the one above, preferably with a bit more power.