ESI MoCo Passive Monitor Controller

Unlike typical monitor controllers that rely on active electronics and external power, the ESI MoCo delivers a purely passive, transparent signal path that adds no coloration, noise, or distortion. This compact desktop unit gives you precise hands-on control over listening levels and routing for two stereo sources to two stereo monitor pairs, all housed in a robust metal chassis built for daily studio use.

Highlights

• Passive design – no power supply needed, no coloration
• Large, high-precision rotary volume potentiometer
• Two stereo inputs: XLR/TRS combo and RCA
• Two stereo outputs: XLR and TRS
• Dedicated mute, input select, output select, and mono switches
• Ultra-linear frequency response for accurate monitoring
• Compact and durable metal housing

In daily use

Place the MoCo between your audio interface and active monitors to gain immediate hands-on control over listening levels. Switch between a mixing console and a mobile device without repatching cables, or A/B two sets of speakers with the press of a button. The mono switch helps check phase compatibility, while the mute function provides instant silence during recording takes. Because the signal path is entirely passive, what you hear is exactly what your source delivers – no added noise or distortion.

Full specifications

• Controller type: Passive monitor controller
• Input channels: 2 stereo (A: XLR/TRS combo, B: RCA)
• Output channels: 2 stereo (A: XLR, B: TRS)
• Volume control: Large rotary potentiometer, full attenuation from -∞ to 0 dB
• Control switches: Mute, Input A/B, Output A/B, Mono
• Power requirement: Passive (no external power supply needed)
• Signal path: Purely analog, transparent
• Chassis material: Robust metal housing
• Frequency response: Ultra-linear
• Dimensions (W x H x D): 108 x 47 x 62 mm
• Weight: 0.3 kg

Final note

The ESI MoCo offers a straightforward, transparent solution for monitor control, ensuring your mixes are heard exactly as they are, without any added character or noise.