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Messages - Bogeyjack

#1
What a godsend.  I have been looking for schematics for years.  I own 3 GBX amps (bottoms) and 2 drivers, one for guitar and one for bass.  the only thing missing is the user manual, if one exists.  I want to know what  the Response (A_B_C_D_E) knob indicates at each setting.  Again, thank you very much. Bogeyjack  :dbtu: