TwoQuiet Stepped Attenuator Upgrade for Crackatwoa Headphone Amplifier
When we were developing the BeePre 300B preamp kit we built the prototype preamp circuit itself on a pair of chassis, and we built several outboard chassis platforms that allowed us to try various attenuator schemes. We tried all sorts of schemes – inexpensive carbon potentiometers, our old standby Sweetest whispers attenuator, high end stepped attenuators from other manufacturers, transformer volume controls, ladders, shunts, series steps, etc., etc. The end result was the popular BeeQuiet attenuator upgrade for the BeePre.
This design beat out the others by quite a sonic margin, and now the same 36 step attenuator design is available as an upgrade for the Crackatwoa Headphone Amplifier.