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Lexicon MX-400 Stereo Reverb/Effects Processor

Model: MX400

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About: Lexicon MX-400 Stereo Reverb/Effects Processor

Plug-in programming and recall with the power of Lexicon hardware.

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®, 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.


Meet the most Lexicon power ever offered in a super-affordable 1RU effects processor. Perfect for band PAs, churches and clubs.

We know you need to be able to make changes quickly, so we designed the MX400’s intuitive front panel to be a bare minimum of knob tweaks away from any adjustment or effects change. For example, three individual, assignable parameter controls mean you don’t have to page through menus to fine tune a reverb tail. Because you can use its built-in dbx® compression and de-essing in tandem with reverb, the MX400 is the perfect tool for taming problem vocalists. Finally, you can rely on the MX400 for years to come, through countless load-ins and loadouts — although its sound is A-studio-quality, we designed the MX400 to withstand dust, moisture, shock, power surges and all the other rigors of live sound use.


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™ (PC only) and Audio Units (Mac only) 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


UPC: 691991500237 is a Canadian authorized Lexicon retailer.

Reviews: Lexicon MX-400 Stereo Reverb/Effects Processor

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Warranty: Lexicon MX-400 Stereo Reverb/Effects Processor Warranty:

30 Days

Manufacturer's Warranty:

Soundcraft, Lexicon, BSS, and dbx products are warranted to be free from defects of material and workmanship for 1 year from the date of delivery to the original user. Repairs will be undertaken at no cost for labor or materials within this time period.