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Aberle

New member
Joined
Apr 16, 2026
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2
Location
USA
Why does my JP16 have bass/mid/treble trimpots? I can't find any information online about what they actually do.
 

beej

Moderator
Joined
Aug 16, 2004
Messages
12,472
Location
Toronto, Canada
My guess is that it's the same PCB whether or not you have the piezo option. Have you tried adjusting the trimpots? They won't do anything if you don't have the piezo.
 

fbecir

Well-known member
Joined
Jul 3, 2005
Messages
3,044
Location
Paris, FRANCE
We are talking about John Petrucci's guitar, thus I presume that the 3 trimpots control :
  • how many humans die every minute
  • the speed of the Earth rotation
  • the heat of the Sun
But it works only if you play as good as JP !
 
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