Marshall superlead depth knob

MrScary · Feb 23, 2008

a buddy of mine just got a 1974 marshall superlead. he wants to add a depth knob to it. anyone know how hard this would be to do, and how to actually do it??

HugoLC · Feb 25, 2008

what is a depth know what does it change to sounds and tone ?

RD/Steve · Mar 5, 2008

Resonance Control
This mod was first posted by Mark Cameron. It works on on Fenders and Marshalls with great results. It adds an extra knob (output jack holes work well for this). Basically, it is the opposite of a presence control, allowing you to tighten up the bottom. I will try to talk you thru the wiring. Looking at the back of a 1meg pot, left to right, numbering pins one two and three. Disconnect your purple feedback wire from the impedance selector and solder to pin three. Solder a new wire from the feedback resistor (where the purple feedback wire used to be connected) to pins one and two. Solder a .0047 cap from pin three to pins one and two.