BK Butler's original hand made Tube Driver guitar pedal used by Eric Johnson, David Gilmour, Billy Gibbons, Joe Satriani, Kenny Wayne Shepherd, Robbie Krieger, and many other pros.

Eric Johnson and BK Butler
Cliffs of Dover –Wikipedia
ORIGINAL TUBE DRIVER DESIGNER’S GENERAL WARNING! Some used 4-knob Tube Drivers marked ‘Chandler’ are NOT the original design by BK BUTLER! All authentic Tube Drivers have “Concept & Design: BK Butler on them. Pedals with separate AC power supplies or ‘wall warts’ are NOT original and do NOT sound the same! Order here and get a REAL BK Butler hand-made Tube Driver!
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See the Butler 5150 reviewed in Home Theater magazine. Click here to view their comments.