MicMix XL-121 Master Room Reverberation System Reverb Rack Module

MicMix Master-Room XL-121, a vintage single-channel rackmount spring reverb made in Dallas, Texas. It’s in good working condition and shows honest cosmetic wear from years of use, including rack rash, scuffs and scratches on the chassis, and some wear to the faceplate. None of it affects the sound or operation.

One knob looks like a replacement and the power button appears to be missing.

The Master-Room units were studio and broadcast staples in the late ’70s and early ’80s, and they’re known for a smoother, denser sound than the typical spring tank, with less of the boing and flutter on transients. The XL-121 sounds great on vocals, guitars, snare, and synths, and it has a dark, warm character that sits in a mix in a way digital reverbs don’t.

Features:

• Single-channel (mono) spring reverb
• Front-panel EQ for shaping the reverb tone
• Dry/reverb mix control for use inline or on a send
• 1U rackmount chassis

It has been tested and passes audio cleanly, with a full, even reverb. As with any spring unit of this age, expect a little noise floor, and expect the springs to react if the chassis gets bumped.

Includes the XL-121 only. It will be packed carefully, with the unit well padded to protect the spring tank, and shipped promptly. Feel free to message me with any questions.