| BTB 555
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Hey!
this website is tops!
Gotta question... I just recently purchase a used BTB 555 that I really like. The dude I got it from couldn't tell me exactly how the 5th and sixth knobs alter the signal pattern. Anybody out there know? I figured out the master volume and the 3-band EQ gains, but not sure about the others. Thanks loads for input! | 
