Lexicon MPX550 24-Bit Dual Channel Effects Processor The Lexicon MPX550 is a professional 1U stereo effects processor designed for studios and live sound environments that need the unmistakable depth and clarity of Lexicon’s reverb and multi‑effects. Powered by 24‑bit processing and the LexiChip engine, it delivers smooth, natural ambience, musical delays, rich modulation, and flexible dual‑channel operation in a compact, reliable format. Key Features 24‑bit internal processing with high‑quality A/D and D/A conversion Lexicon reverb algorithms for spacious, natural‑sounding ambience Dual‑channel architecture with multiple routing modes (dual mono, cascade, split, stereo) Extensive preset library plus user‑programmable memory Tap Tempo, full MIDI control, and S/PDIF digital I/O Balanced XLR and 1/4" analog I/O for seamless integration Ideal For Studio engineers seeking classic Lexicon reverb and versatile multi‑effects Live sound applications requiring dependable, great‑sounding processing Producers wanting hardware‑based ambience, delay, and modulation Specs Analog Audio Input: XLR and 1/4 in. balanced (T/R/S) Input Level: +20dBu to +8dBu Input Impedance: 50k, balanced; 25k, unbalanced Analog Audio Output: XLR and 1/4 in. balanced (T/R/S) Output Level: +26dBu, balanced; +20dBu, unbalanced Output Impedance: 105dB typical, 20Hz - 20kHz, unweighted A/A: >101dB typical, 20Hz - 20kHz, unweighted MIDI Interface: 5-pin DIN connectors for MIDI IN and MIDI OUT/THRU Footswitch: 1/4 in. T/R/S connector for bypass and tap Power Requirements: 90 - 250 volts AC, 50 - 60Hz, 12.5 watts (3-pin IEC connector) Dimensions: 19 in. W x 1.75 in. H (1U) x 4 in. D (483 x 45 x 102 mm), rack mount standard Weight: 3 lbs. (1.4 kg) Operating Temperature: 32 to 104 degrees F (0 to 40 degrees C) Maximum Humidity: 95% without condensation