I am working on the same type of setup... individual tracks to individual rooms... for a haunted house. I just purchased an LP-838 MP3 amp and am waiting for it to arrive to experiment with amplifying these separate channels for the speakers in each room. I am currently using multiple stereo recievers/amplifiers that take up a lot of room. I will follow up with my results as soon as I get that far.
http://www.dinodirect.com/wholesale-pow ... gital.html
There are similar amps out there for less but I decided to go with the above site because I need the 2.1 capability for each room, they quoted a price break for buying 10 units, plus they have a warehouse in the U.S. (Hopefully mine ships from there)
The amp doesn't come with the 12v adapter from this site but I would like to go with a 12v power supply capable of running multiple amps at the same time.
If that info helps you somehow maybe you can share with me what audio card setup you have that can control the 8 individual outs, and what type of system you have. Thats the part of the equation I am missing.
Thanks