Built A Booster But Need A Switch, Maybe?

[Joe Hart]

I built a single transistor booster that's kind of an LPB-1 or Hornby Skewes or something -- I lost track while experimenting with resistor and cap values! But it sounds great as it. Anyway, I have a very cool box that I want to use, but I need another switch or knob because the box has an extra hole in it. I have a volume control and an input blend cap knob. Any ideas? Thanks.
-Joe Hart

[Heemis]

Switchable clipping diodes to ground on the output?  Could be done with a simple SPST.