Amplifier Inside Dust Cleaning, Pots Cleaning, DC Bias Setting

A Little video of me cleaning one of my recent Amplifier purchases
Cleaning the dust build up inside, as is common with these top vent amps
After cleaning the main board, I also cleaned all the metal inside casing just by brushing and hovering.
When adjusting the DC Bias, I normally have the amp running for 20 minutes or so at a medium volume with speaker connected.
Then turn volume down to zero, bass & treble at flat, balance in the middle and CD or Aux as input and speakers disconnected.
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