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Discussion Forum for Mesa Boogie Products
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PostPosted: Thu Nov 16, 2017 8:44 pm 
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Mark III

Joined: Sun Feb 18, 2007 7:55 pm
Posts: 164
Just moved and got my amp delivered (finally), but there are problems... The ch.1 treble pot is broken, and the entire amp is wack. All channels are quiet and very thin, almost out of phase. I can turn ch 3 channel vol up to 5-7 and the master volume up to 5 and almostntalk over it, and it is very thin and very strange sounding. Very little drive on any channel. All tubes are glowing, tapping doesn’t indicate any issues. I will be changing them all out, but does this sound like anything in particular?

Back knob is on Ft Sw (with foot switch plugged in).


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PostPosted: Sun Dec 10, 2017 2:31 pm 
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Mark II
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Joined: Fri Nov 16, 2012 4:55 pm
Posts: 66
Location: East Coast, New Jersey
Did you figure out the problem? Friend of mine has a similar issue with his IV. Started happening when the amp fell face forward while packing up from a gig. Can get volume but only if masters are past 5 and output is past 4-5. Everything sounds normal, but there seems to be so much play on the volume controls now.

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