How to make your own amp and speakers
Step Three – Solder your amp
OK, soldering your amp and setting up your 'speakers' will take about two hours, so get ready for a proper tech crafts session. Set your PCB down (you're going to be spending a lot of time together) then bend, insert, solder and trim one diode, an LED, a stereo jack and nine different resistors into place on the board.
Next up, stick your switch next to the LED and (this bit is important) take the 8 pin socket and solder it centre stage on your PCB – this is where you'll slot in your integrated chip later. There's also ten capacitors to insert and solder – some are polarised, with different leg lengths, so you can only insert them one way round. The TWSU board has handy + and - signs on. Here's a video that makes it look really quick and easy.