Quad Attenuverter/Mixer

Four attenuverters, each normalled into a summing mixer. At 12 o'clock the channel is silent, clockwise attenuates, counter-clockwise inverts and attenuates. Inserting an output jack removes that channel from the mix, and a 5V reference is normalled to input 1. 6 HP, 0805 SMD passives with SOIC op-amps.

Documentation

• Bill of materials (BOM)
• Schematic
• Fabrication files (PCBA-ready)

Links

• Source / files on GitHub
• Maker page
• Buy: Kassutronics Store

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This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

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