Born from the collaboration between Josh Smith, J. Rockett, and Tim Jauernig, the J. Rockett Josh Smith Dual Tremolo offers simplicity and great sound. The JSDT was modeled after early Leo amplifiers and features two channels of tremolo. Stack identical trems together, cascade two wildly different sounds, use only one, or even use the Boost knob to get the JSDT to function as a clean boost.