CATALINBREAD TOPANGA reverbSpring reverb simulator based on the legendary Fender 6G15 outboard spring reverb unit, typical of surf guitar and other great guitar sounds from the sixties. Part of its magic, and how it differs from the internal spring reverb found in most Fender style amps, is that it is run *in front* of the amp, causing the reverb signal to distort and get more intense than the internal circuit could. It also had a Dwell knob, which controlled how hard the