JFT Class-A Transistor Colour inventory The 500EXT allows you to

The 500EXT allows you to test and calibrate your 500-series modules without reaching into your rack

Pair with Pentode or CTX Colour modules for the ultimate Pultec vibe

-Mike Hillier

For practical purposes

JFT Class-A Transistor Colour inventory The 500EXT allows you toThick, musical saturation that shines on any source. Part of the magic of vintage solid state gear is that, because transistors were expensive, they used as few as possible, so each one had to work harder. And when transistors are pushed to their limits, they begin to distort in beautiful ways. The JFT Colour is designed by this philosophy: choose great sounding transistors and then make them work very hard. The JFT employs two class A saturation