The Danelectro Filthy Rich Tremolo delivers the authentic sound of the Tremolo circuitry used in Danelectro amps since the 1940s. The result is an extremely rich and deep sound that can be precisely adjusted using the proven Speed and Depth controls. In addition, the " Hard / Soft " switch can be used to recall two different sound characters. Here " Hard " provides a choppy sound, while " Soft " comes up with a soft '60s Modulation .