This is our latest incarnation of the legendary preamplifier JC-2. 

We once launched the kit in early 2009 and received exceptional reviews. In this version : 

1. The whole amplifier circuit is now essentially the same as JC-2, with the output stage now using medium power NPN and PNP( was a BJT-JFET cascode stage that was not working very satisfactory in terms of dricing capability). We intentionally increased the quiescent current to let them work at class A. This enhances the current driving power and gives the whole preamplifier a warmer sound presentation ; 

2. As in the prior implementation, low impedance high speed shunt regulator is used.

3. Components : Dale or low tempco metal film resistors are used in the circuit.