Step 5: Decoupling Capacitors

C10 is a decoupling capacitor, but why so big? The amplifier draws a lot of power suddenly, and if the power supply can't keep up with the sudden demand in spike, there will be audible distortion. By adding a very large capacitor, the amplifier is free to draw as much power as it needs to handle it, resulting in a smoother listening experience.

C12 is there to remove the DC component from the audio signal. This ensure that the speaker can make the most of its dynamic range.

Tools Needed

• Soldering iron
• Cutter

Parts Needed

• 2 x 100μF capacitors

Instructions

1. Install the 100μF capacitors onto the board and solder them into place.

2. Remember to check the polarity of the capacitors as you insert them into place (+ and - signs).