This is a small powered amplifier that plugs into a 1/8" stereo jack and accepts the same. Many people know nothing about amplifier circuits and would have no idea how to make one, so why don't we let a company make the circuit, and then just tweak it to meet our needs (So admittedly one does need to know a little about electrical circuits, speakers, and soldering).
This is the perfect thing to provide the extra energy needed to power larger speakers with a portable audio device without severely draining battery power. This pocket amp also allows for louder audio through headphones or small speakers. Time to blow out those voice coils!
Step 1: Hunt and gather supplies
For this project you will need:
-A small hearing amplifier, often called a personal amplifier or advertised as spy hearing (I used a
Radioshack brand "amplified listener" )
- Stereo headphone cable with 1/8" jack
-2X AAA batteries (or whatever your particular model requires)
-Connecting wire, scrap wire
-Hot glue, silicone or epoxy
-Drill and bit slightly larger than the the width of your headphone cable
-Audio source and headphones to check your progress.