1 Mel Waldorf 6 months ago Want a second mix level for your 6G15 style reverb? You can get it with a modified on/off footswitch - basically, instead of shunting the whole reverb signal to ground, you control how much to ground with a potentiometer. Demo here: Circuit-wise, it's not exactly a second mix; it controls how much of the reverb pan return is sent to the reverb recovery tube. Still, it requires no modification of the Reverb unit, which is a big plus. Simple and functional.