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Lexicon MX400 Multi Efects Rack Unit

Dolphin id:19159 Product SKU:LEX0024

This product is currently not available for purchase.

Dual Stereo/Surround Reverb Processor

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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  VST® or 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®, 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.


Also available: The MX400XL with balanced XLR inputs and outputs.

  • 17 legendary Lexicon® reverbs
  • Lexicon delays & modulation effects
  • dbx® compression and de-essing
  • Quad-processor design
  • 7 effect routing options
  • 99 Factory/99 user programs for Stereo mode
  • 99 Factory/99 user programs for Dual-Stereo mode
  • 25 Factory/25 user surround programs
  • USB "Hardware Plug-In" feature with
  • VST® and Audio Units plug-in software
  • MX-Edit™ Editor/Librarian software
  • Dual S/PDIF Digital Input/Output
  • 24 bit, 48kHz/44.1kHz sample rates
  • Large front panel LCD display
  • MIDI IN and THRU
  • 1/4" balanced/unbalanced TRS I/O



  • Small Hall
  • Large Hall
  • Surround Hall
  • Small Plate
  • Large Plate
  • Room
  • Chamber
  • Gated
  • Reverse
  • Vocal Hall
  • Vocal Plate
  • Drum Hall
  • Drum Plate
  • Ambience
  • Studio
  • Arena
  • Spring


  • Studio Delay
  • Digital Delay
  • Tape Delay
  • Pong Delay
  • Mod Delay
  • Reverse Delay
  • 2-Tap Delay

dbx® Dynamics:

  • Compressor
  • De-Esser


  • Chorus
  • Flanger
  • Phaser
  • Tremolo / Pan
  • Rotary
  • Vibrato
  • Pitch Shift
  • Detune

*All MX400 reverbs, delays, dynamics and effects parameters can be accessed and edited from the inlcuded VST® and Audio Units plug-ins.

Analog Audio Inputs
Connectors (4) 1/4" TRS balanced or unbalanced
Impedance 50k Ohms bal., 25k Ohms unbal.
Input Level +4 dBu nominal, +24 dBu maxium 48kHz or 44.1kHz
A/D Conversion 24-bit, 48kHz 128 x oversampling
Analog Audio Outputs
Frequency Response 10Hz - 20kHz +0 dB/-0.5 dB
THD+N <0.0019% 10Hz - 20kHz
Dynamic Range >109dB (A-weighted) A/A
Crosstalk typical <-80 dB 20Hz - 20kHz
Digital Input and Output
Connectors Dual RCA phono (S/PDIF)
Format S/PDIF 24-bit
Sample Rate 44.1 or 48kHz
Frequency Response 10Hz to 22kHz ±0.5 dB @ 48kHz
Control Interface
USB USB 1.0 for MX-EDITª Editor/Librarian and VSTª/Audio Units plug-ins
MIDI In/Out 5-pin DIN
Foot Pedal 1/4" phone jack
Power 117 VAC or 230 VAC, 18 Watts
Size (W/H/D) 19" x 1.75" x 7.25"*/6.375"
Weight 5.8 lbs. (2.6 kg)

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Lexicon MX400 Multi Efects Rack Unit Reviews


Lexicon MX400

The first unit I got was malfunctioning but I had great support from Dolphin music and Lexicon and they shipped me a new one that works fine.
I do computer based music so I will focus more on that.

I\'ve used a few software verb plug-in, like UAD 2 Realverb, ableton reverbs, reverbs included in protools etc. but nothing I\'ve tried sounds as good as this. It is not an obvious difference in creative FX but in natural sounding reverbs, it does make a difference. Reverb is a complex and CPU demanding effect so it’s probably the first effect you would want to go \"hardware\" with.

The Lexicon MX400 has two processors (A and B) so you can have two different effects running at the same time. I usually use a natural verb on a return track for mixing purposes, without plug-in, and free the other processor to use in creative effects, like chorus or delays. The plug-in allows for quick loading of presets (factory and user).
I use SPDIF connections an XLR and I get excellent sound quality, zero noise. The plug-in and standalone is great, you can quickly jump between presets and save your own presets. It’s possible to automate parameters from the DAW. This means full hardware/software integration. The USB connection is stable and the plug-in doesn’t load the CPU.

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