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Discrete Saturation Hybrid Saturation Colour (Discontinued)

The Discrete Saturation Colour is a new take on vintage coloration from designer Bart HRK. The Colour is designed with the philosophy that saturation is best applied in layers. The circuit combines several flavors of vintage saturation—silicon and germanium transistors, and passive diode-bridge compression—for an effect that is fat, smooth, and round.

About the Designer

Bart HRK is an analog design engineer, specializing in analog recording equipment based on discrete transistors and thermionic valves. He has worked as a designer for Focusrite and AMS-Neve on projects like the 1073LB preamp, 2264 compressor, ISA2 preamp, and RED1 500 preamp.


  • NOS germanium and silicon transistors
  • Combination of silicon and germanium diodes
  • Completely discrete, class-A signal path
  • Multi-stage saturation circuitry for smooth, musical coloration

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