Item# LEXMX400V
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General Specifications

Analog Audio Input Connectors four ¼" TRS balanced or unbalanced
Analog Audio Input Impedance 50k Ohms bal., 25k Ohms unbal.
Analog Audio Input Level +4 dBu nominal, +24 dBu maximum
Analog Audio Input A/D Conversion 24-bit, 48kHz or 44.1kHz, 128 x oversampling
Analog Audio Output Connectors four ¼" TRS balanced or unbalanced
Analog Audio Output Impedance 2k Ohms bal., 1k Ohms unbal.
Analog Audio Output Level +4 dBu or –10 dBV nominal (software adjustable), 24 dBu maximum
Analog Audio Input D/A Conversion 24-bit, 48kHz or 44.1kHz, 128 x oversampling
Frequency Response (Effects Bypassed) 10 Hz – 20kHz +0 dB/–0.5 dB
THD+N (Effects Bypassed) <0.0019% 10Hz – 20kHz
Dynamic Range (Effects Bypassed) >109 dB (A-weighted) A/A
Crosstalk (Effects Bypassed) typical < –80 dB 20Hz – 20kHz
Digital Input and Output Connectors Dual RCA phono (S/PDIF)
Digital Input and Output Format S/PDIF 24-bit
Digital Input and Output Sample Rate 44.1 or 48kHz
Digital Input and Output Processing Delay 3.7 ms @ 48 kHz
Digital Input and Output Frequency Response 10Hz to 22kHz ±0.5 dB @ 48kHz
Control Interface USB USB 1.1 for MX-EDIT™ Editor/Librarian and VST™/Audio Units plug-ins
Control Interface MIDI In/Out 5-pin DIN
Control Interface Foot Pedal ¼" TRS phone jack
Power 117 VAC or 230 VAC, 18 Watts


Width 19 in (48.26 cm)
Height 1.75 in (4.4 cm)
Depth 7.25 in (18.5 cm)
Weight 5.8 lbs (2.6 kg)
  • 1 x MX400 Dual Stereo/Surround Reverb Processor
  • 1 x Owner's manual
  • 1 x MX Edit/USB Driver CD
  • 1 x Lexicon Warranty Card
  • 1 x Power Cord
You want the rich, luscious sound that’s defined studio reverb for three decades - a genuine Lexicon hardware processor. But you also want the flexibility of programming high-quality effects right inside your DAW program…without bogging down your CPU or resorting to expensive processing cards. Have it all with the MX400. All parameters of every reverb, delay and dynamic effect in this powerhouse quad processor are available inside any AU compatible DAW program. Just link your computer to the MX400 with a USB cable and control all automation and recall parameters exactly as you would with any software plug-in — while enjoying the sonic benefits only Lexicon hardware can provide. Along with our unique “hardware plug-ins” for PC and Mac® (32-bit only), we’ve also included MX-Edit™ Librarian software so you can store and recall custom programs or pull up your choice of 223 genuine Lexicon settings including 25 dedicated Surround Programs. At its heart, the MX400 is everything you would expect from the company that invented digital reverberation. Seventeen Lexicon reverbs, delays and modulation effects plus dbx® compression and de-essing. A generous LCD display and big comfy knobs you can get your hands around. Get a demo at your Lexicon dealer. And then get on the road to creating a hit.

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