Built on the foundation of a Hammond Organ Company design from the '30s that Leo Fender would eventually adapt for his legendary "blackface" amps, the Source Audio True Spring Reverb faithfully recreates the natural atmosphere of a staple effect in a digital pedal. Short, Long, and Tank modes are paired with three distinct tremolo types (the reverb's best friend), and the signature Neuro app lets you go into your phone and tailor everything from EQ to decay length.