Here is a great example of a DIY amp project. The TDA2050 Hi-Fi Chip Amplifier looks like a good chip to use for this purpose. There is full schematics and details provided so that you can build your own.
"The amplifier is built around a single integrated circuit (IC), the TDA2050V which is produced by STMicroelectronics. From the data sheet, the TDA2050V is intended for use as a Class-AB hi-fi audio amplifier. The chip will operate within a supply voltage range of +/-4.5V to +/-25V. At about 25W of power output the efficiency is about 65%. One thing to note is that the gain of the circuit needs to be at least 24dB to maintain stability."
Originally by Alan Parekh from Daily DIY on July 10, 2009, 4:39am
Originally posted 2009-07-11 20:11:39.