Joe Coker Posted September 26, 2011 Share Posted September 26, 2011 Does anyone know where I can find a diagram on the knobs on a Thunderbird IV Pro? Link to comment Share on other sites More sharing options...
Hungrycat Posted September 28, 2011 Share Posted September 28, 2011 Four-knob, right? Should be Volume, Blend, Bass, and Treble. Like this if looking at the front of the bass: (Bl)(Vol) (Tr)(Ba) Link to comment Share on other sites More sharing options...
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