You can emulate the center channel by sending the signal to both speakers. Very easy to do in the analog domain (can be done with as little as 4 resistors) but not so easy in the digital domain (FPGA would be the easiest, which is not at all beginner friendly).

I build 5 volt amps with Bluetooth. (3 watts/channel) Will run all day on a 5 volt bank battery. (5600 maH.) Impressive on some sensitive speakers..

http://imagizer.imageshack.us/v2/640...633/rVo3gO.jpg

http://imagizer.imageshack.us/v2/640...538/rBcHGQ.jpg

I also build my own Boom Boxes with these combos. Anyone wanna see some pics?

Put em in the thread where I won the badger solar panel.

OK.. Will do tonight..

Perfect match for that systerm.. ;)

*They's over there..