Years ago I would hand build the little audio amps. But now you can get a nice production board for less money than it takes to drive to Radio Shack.
Here is a glimmer shot! Just click on picture to go to there web page.
Onboard LM386 Chip
200 multiplier benefits circuit design
on-board speaker wiring Block
on-board 10K variable resistor, you can adjust the volume of the enlarged
Onboard power indicator
the chip pin leads, can be directly input audio signal
Operating voltage: 5 ~ 12V
board size 41 (mm) x13 (mm)
Here is one I have put together to install and test with.
Black Wire to Ground
Red Wire to +5 Volts
White Wire to Audio Output pin 3 off the Monitor Jack