Behringer Composer MDX 2100 — Dual-Channel Compressor/Limiter + Expander/Gate (1U Rack)
Classic “do-it-all” dynamics processor for live rigs and studio racks.
The MDX 2100 is a practical, easy-to-dial-in dual-channel unit that can tame peaks, tighten vocals/instruments, and clean up noise with its expander/gate. Great for live vocals, bass, kick/snare shaping, DJ/mic control, broadcast/streaming, or insert use on mixers/interfaces.
Condition:
Very good condition with minor wear/scratches from normal rack use (light cosmetic marks on the face/rack ears).
Included:
Behringer Composer MDX 2100 (1U rack unit)
AC power cord only
(No box, manual, or other accessories.)
Features & Controls:
Per Channel (Channel 1 + Channel 2)
Expander / Gate section (threshold + release Fast/Slow)
Useful for reducing hiss/room noise and tightening mic bleed
Compressor / Limiter section
Threshold, Ratio, Attack, Release (with Auto option), Output gain
In/Out switch per channel (easy A/B)
Peak Limiter (level control)
Handy “safety net” to prevent unexpected clipping
Key Listen + Key Ext. (Sidechain)
Lets you monitor the detector path and use external sidechain (ducking/de-essing style setups depending on your routing)
Metering
LED Gain Reduction meter + Input/Output Level meter
Routing / I/O
Balanced XLR inputs & outputs (rear)
Key Ext. jacks for sidechain/send-return style routing
Operating level switch: +4 dBu / -10 dBV (rear) — works with pro and consumer gear
Link/Couple mode for stereo linking (so both channels respond together)
Quick use ideas:
Vocals: light compression + gate for cleaner live sound
Bass: smooth peaks and keep level consistent
Streaming/Podcast: gentle compression + limiter to protect against clipping
Stereo bus: link channels, mild compression for glue (subtle settings)
FAQs:
1) Is it stereo linkable?
Yes — it has a couple/link functionality so you can run it as a stereo dynamics unit.
2) Does it have balanced connections?
Yes — balanced XLR in/out on the rear.
3) Does it work with consumer gear too?
Yes — it has +4 dBu / -10 dBV operating level switches.
4) Can I use it for ducking/de-essing?
It supports Key Ext/sidechain routing (exact setup depends on your signal chain and what you patch into the key input).
5) What’s included?
Unit + AC power cord only. No box/manual.
