Simple Mixer

b:03 features two independent mixers, each capable of summing up to three inputs into one output. Users can select between three gain settings: unity (1:1), half (1:2), or one-third (1:3), allowing precise control over signal levels. Unused inputs default to zero volts, ensuring clean operation without introducing noise. Gain settings are adjusted using an onboard jumper, and they affect all inputs in each mixer equally.

https://bartinstruments.com/products/b-03