Passive stereo monitor controller for professional computer-based studio applications and home use. It provides precise attenuation of analog audio signals between sources such as PC sound cards or DAWs and active speakers or amplifiers. The unit has balanced XLR/6.3 mm combination inputs, 3.5 mm stereo input and output connectors, 6.3 mm outputs, a rotary level control, mute function, and mono summation. It operates passively without a power supply in a compact desktop console housing.