Trying to build a suitable volume control for Gungnir Multibit & Soekris. In the spirit of simpler is better, here is a high-quality build of the original Pass B1 buffer pre-amp that I’ll be testing against known-to-be excellent transformer-based volume controls. More on that shootout perhaps later this week. I chose the capacitor-coupled version rather than the more complex capacitor-free variant for circuit-simplicity reasons. After listening to a lot of fancy circuits that have virtually no measurable distortion but sound dead, I’m starting to think the phase distortion from many active components is a good reason to keep it simple. I used Audyn reference coupling caps, which I have found very good in prior projects. Resistors are low-noise metal film 1%. Pot is Alps. Power supply is a low-noise switcher in a faraday cage (and is dead silent). Also has an IR-remote control circuit on a dedicated power supply and board. Signal, circuit, and earth grounds are separately managed. Listening test results here. Update: March 1, 2019: Frequency response results here.