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Lexicon MX300 Studio Reverb Effects Unit

Dolphin id:28199 Product SKU:LEX0027

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Studio Reverb Effects Filter compatible with audio digital work stations in a single rack unit.

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Lexicon's revolutionary MX200 and MX400 changed everything. The great sound of a hardware Lexicon reverb — plus the ability to put that power to work as part of your DAW workflow via PC VST® and Mac® AU plug-ins. Now we’ve packed a significant portion of the MX400’s feature set into the ultra-affordable MX300.

All parameters of every reverb, delay and dynamic effect in this powerhouse processor are available inside any PC VST® or Macintosh® AU compatible DAW program. Just link your computer to the MX300 with a USB cable and control automation and recall parameters exactly as you would with any software plug-in. You get the sonic benefits only Lexicon hardware can provide…without bogging down your computer’s CPU with the extreme demands of reverb plug-ins.

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 an unlimited number of Lexicon settings.

We urge you to do a serious side-by-side listening test of of the MX300 versus comparably-priced competition and units costing far more. You’ll hear why Lexicon is the leader in reverberation effects. Why not put the unprecedented power and connectivity of the MX300 to work on your productions?

When money is no object, Lexicon gets written into more major tour riders than any other brand of reverb. But when money is a concern, you can still have the rich, detailed texture that makes the Lexicon sound unique. Here is a full arsenel of voice and instrument-enhancing effects including sixteen Lexicon reverbs, seven delays, genuine dbx® compression and de-essing and modulated effects that will make any performance sound better.

We designed the MX300 to be ultra-easy-to use in demanding live sound situations. Once a program has been selected, you have instant access to three parameter knobs — instead of having to page through extra menus. You can program a whole night of presets, and dial them up quickly with the dedicated program select knob and bright LED display. Like every product that Lexicon makes, the MX300 is designed to withstand years of jarring, jostling, load-ins, load-outs, brownouts and power surges. It’s simply the most live reverb ever offered at this price.

Choose from five effects routing options

The MX300 lets you switch effect routings easily via front panel controls, so you don’t have to spend time behind your rack changing cables. Dual Mono sends the Left and Right input signals through Effect 1 and Effect 2 respectively. Each signal is then routed to its respective output, completely independent from the other. Cascade (Series) sends Left and Right input signals first through Effect 1, then through Effect 2, and then routed as a stereo signal to their respective outputs. Dual Stereo (Parallel) routes Left and Right input signals through both effects independently. Both Effects’ output signals are then mixed together, and routed to both the outputs as a single stereo signal.
Mono Split sends Left input signal through Effect 1, while the Right input signal is sent through Effect 2. The output signals of both Effects are then mixed together, and routed to both the outputs as a single stereo signal.
Stereo routing provides a single stereo effect path for Left and Right signals. This routing removes one of the effect modules for users requiring a streamlined signal path with only a single effect for their needs — but taking advantage of all of the MX300’s processing horsepower.


  • 2-in / 2-out configuration
  • 16 legendary Lexicon® reverbs
  • Lexicon delays & modulation effects
  • dbx® compression and de-essing
  • Input Gain Control for stereo inputs
  • Intuitive Navigation/Edition with large LCD screen, Page/Select Wheel, 3 top-level parameter controls plusExit, Tempo and Bypass selectors
  • 5 effect routing options
  • 99 Factory / 99 User programs
  • USB “Hardware Plug-In” feature withVST® and Audio Units plug-in software
  • MX-Edit™ Editor/Librarian software
  • S/PDIF Digital Input/Output
  • 24-bit, 48kHz/44.1kHz sample rates
  • 1/4" footswitch jack
  • MIDI IN and THRU
  • XLR and 1/4" TRS balanced I/O


  • Reverbs
    • Small Hall
    • Large Hall
    • Small Plate
    • Large Plate
    • Room
    • Chamber
    • Gated
    • Reverse
    • Vocal Hall
    • Vocal Plate
    • Drum Hall
    • Drum Plate
    • Ambience
    • Studio
    • Arena
    • Spring
  • Delays
    • Studio Delay
    • Mono Delay
    • Tape Delay
    • Pong Delay
    • Mod Delay
    • Reverse Delay
    • 2-Tap Delay
  • dbx® Dynamics
    • Compressor
    • De-Esser
  • Modulated Effects
    • Chorus
    • Flanger
    • Phaser
    • Tremolo / Pan
    • Rotary
    • Vibrato
    • Pitch Shift
    • Detune

All MX300 reverbs, delays, dynamics and effects parameters can be accessed and edited from the included PC VST® and Macintosh® Audio Units plug-ins.


  • Analog Audio Inputs
    • Connectors Two 1/4" balanced TRS, Two XLR female
    • Impedance 50k Ohms bal., 25k Ohms unbal.
    • Input Level +4 dBu nominal, +24 dBu maximum 48kHz or 44.1kHz
  • Analog Audio Outputs
    • Connectors Twp 1/4" balanced TRS, Two XLR male
    • Impedance 2k Ohms bal., 1k Ohms unbal. ¼" only
    • Output Level +4 dBu or –10 dBV nominal (software adjustable), 24 dBu maximum 48kHz or 44.1kHz
    • D/A Conversion 24-bit, 44.1/48kHz 128x oversampling
  • Analog Audio Performance
    • Frequency Response 10 Hz – 20kHz +0 dB/–0.5 dB
    • THD+N <0.0019% 10Hz – 20kHz
    • Dynamic Range >109 dB (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 44.1kHz or 48kHz
    • Processing Delay 3.7 ms @ 48 kHz
    • Frequency Response 10Hz to 22kHz ±0.5 dB @ 48kHz
  • Control Interface
    • MIDI In/Thru 5-pin DIN
    • Footswitch ¼" phone jack
  • General
    • Power 100–120 VAC 50/60Hz, 18 Watts, 220–240 VAC 50/60Hz, 18 Watts
    • Size (W/H/D) 19" x 1.75" x 7.25"*/6.375" (483 x 44 x /185mm*/162 mm) *including knobs.
    • Weight 5.8 lbs (2.63kg)
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Lexicon MX300 Studio Reverb Effects Unit Reviews


Not easy when used in series

Be aware that it does not have an easy dry/wet adjustment. It is deep in the menu and not assignable to a knob. Also all factory programs are set 100% wet.
So use it only parallel with a mixer.



i Bought this unit about 2 months ago due to a growing dislike of VST reverb and after getting a taste for using outboard gear i decided to up my experience of it.

the first thing that hit me when i pulled it out of the is that it was not supplied with a UK plug. this meant that for a few days i could not use it until i got a suitable replacement plug. so a head up would have been nice.

but after getting it set up i was very pleased with the reverb sounds it featured along with the flexibility of them. all perimeters you\'d want to change can be when run as a single effect. the delays also have a very nice sound.

the only problem i have with these is that the tape delay degradation can only be effected by a simple \'smear\' nob, no separate filters or resonance controls were featured, but the effect itself does sound very nice.

another problem that may hinder some people but doesn\'t really bother me much is that when using two stereo effects they must be returned on a single stereo channel. i did realize this when i bought it and the product description makes no attempt to hide the fact, but when running two effects in stereo a lot of the perimeters that could be changed are lost, for example if running the room reverb along with another you only get the options to control, pre delay, mid RT ( which i figure means reflection time) and liveliness. whereas if running as a single reverb the room reverb features controls for, pre delay, Mid RT, diffusion, shape, spread, RT Highcut, High cut, Early reflection time and early reflection level. but i find the quality of the sounds makes up for the lack of flexibility. some reverbs can cost upwards of 300 and offer no flexibility.

lexicon is a name you can trust for quality and i feel this unit for the price deserved a place in most decent studios, i\'m certainly pleased i bought it.

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