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Author Topic: Concert Bass Mid control not working  (Read 376 times)

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Concert Bass Mid control not working
« on: October 24, 2017, 10:40:32 pm »

With the mids dimed and the bass and treble at zero there is a very low volume tone coming through. If I back the mids down to zero the volume of that tone doesn’t change. If I dime either bass or treble the volume increases. I’m assuming it’s a passive Eq stack. I opened the amp up and it looks like the original pots wired right to the board. Any solution before having the pot replaced?


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Re: Concert Bass Mid control not working
« Reply #1 on: October 25, 2017, 05:03:26 am »


according to this schematic:
the bass pot isn't stacked on the mids pot as in the usual fender/marshall tonestacks.
With bass at zero, the signal at the mids pot is shorted to ground. Therefor the mids pot can't work in this situation.