TDA2005 20 Watt Bridge Amplifier
Price: $4.50
Datasheet:
The TDA2005 is a class B dual audio amplifier in the MULTIWATT package specially designed for car radio applications.
It can deliver 10 Watts per channel into a 2 Ohm load with proper heatsinking.
It comes in the 11-pin MultiWatt package.
Check out the data sheet for more details.