I saw a new comment on my video, he asked me how to add a filter capacitor to amplifier board D.C. power supply. I think it's a good question so I will explain it here.
What is a power supply filter capacitor?
It is the capacitor that used to filter AC ripple from DC power supply present to amplifier board. If an amplifier has low capacitive power supply capacitor, it may present a little hum(50/60 Hz low-frequency sound) that you can hear in a quiet room.
The capacitor also stores power and bring it instantly to your amplifier when an amplifier needs more power for a short period of time such as explosion sound in a movie.
However, If an amplifier has high-frequency power supply noise from a switching power supply, small capacitor need to parallel to a power supply and must be attached close to power amplifier IC as much as possible.
Below pictures are the place that you add power supply capacitor.
|TA 2024 board amplifier power supply connection|
|PAM 8610 board amplifier power supply sign|
Caution!! an electrolytic capacitor has polarity. DO NOT REVERSE BECAUSE IT CAN BE EXPLODE OR CAUSE A FIRE!!!