TDA7056 3-Watt Audio Amplifier

TDA7056 3-Watt Audio Amplifier
Price: $2.50
Datasheet: 

The TDA7056 is a 3-Watt Mono Power Amplifier in a SIP-9 package.

It can operate in a low-voltage environment of 3v to 18v.

See the Datasheet for more details.