The Behringer MDX4000 — Interactive Stereo 2-Band Compressor/Leveller/Limiter — was built to put serious signal-processing power into everyday studios, live rigs, and broadcast racks. It pairs the kind of features once reserved for high-end outboard with the practical, road-ready engineering Behringer is known for.

Key Features

• Stereo multi-band processor
• Stereo 2-band mastering compressor/limiter eliminates HF modulation by bass frequencies
• Far smoother than any conventional compressor
• Extremely musical IKA (Interactive Knee Adaptation) program-adaptive compressor with additional leveller
• 4 IGC peak limiters
• Stereo 2-way, 24 dB/oct. crossover with switchable crossover frequency
• True stereo operation
• Accurate 8-segment input/output and gain reduction meters
• Cut-in delay to avoid switch-on thumps
• Servo-balanced inputs and outputs with ¼" TRS and XLR connectors
• Relay-controlled hard bypass switch with auto-bypass function in case of power failures (safety relay)
• High-quality components and exceptionally rugged construction ensure long life

Although this model is no longer in current production, it remains a recognized name in its category and continues to appear in working racks, project studios, and live rigs around the world. For owners maintaining a MDX4000 in their signal chain, this listing is preserved as a legacy reference covering its original design intent and feature set. Behringer products are engineered to deliver professional results without the professional price tag, putting serious tools in the hands of working musicians, project studios, and live engineers alike.