You probably have a dirty volume potentiometer. A proper cleaning would fix it, but I would not attempt that yourself unless you know what you are doing. Some cleaners can dissolve plastic! A temprorary solution would be to spin the pot back and forth a few times with the power off of course. The crackling could damage a tweeter if it is severe enough so either get it fixed or be very careful when changing volume.
Speakers pop when volume knob is turned
I have a MF A300 connected to a pair of Thiel 1.5s. The amp is also connected to a REL subwoofer via its high level Neutrik Speakon cable. Problem is, and this has just developed, my speakers "pop" or "crackle" when the volume knob is turned--no music playing, just the turning the knob. Is this normal? I never heard it before. Should I just play ignorant and just not turn the knob without music. Or is the pop indictitive of some impending failure in the amp?
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