Behringer MX400


4-Channel Line Mixer

Despite its ultra-compact size, the MICROMIX MX400 4-channel line mixer is really big on features! Providing the highest sonic quality at all output levels vs. the competition, the MX400 features ultra low-noise 4580 operational amplifiers for outstanding audio performance – the same chips as the ones found in its much bigger mixers. Use the MX400 as a sub-mixer for your mixer: If you are running short on available channels on your “big” mixer and need to add 3 more keyboards to your mix, just connect them to the MX400, dial-in the mix – and connect MX400’s output to a single input on your main mixer. This way you have the opportunity to mix your keyboard with the MX400, without immediately occupying several valuable mixer channels.

  • Compact 4-channel line mixer
  • Separate volume control for each channel
  • Low noise 4580 operational amplifier
  • 4x 6.3 mm Mono jack inputs
  • 1x 6.3 mm Mono jack outputs
  • Includes 12-Volt power supply
  • Dimensions: 46.5 x 57.2 x 103.6 mm
  • Weight: 190 g
Parallel usable Channels 4
Mic Ins 0
Stereo Ins 0
Master Out 6,3 mm unbal.
Number of Pre Aux max. 0
PC Interface No
Multitrack Recording No
USB/SD Direkt Record No
Effect Processor 0
USB Play No
Bluetooth Play No
Foot Switch No
Matrix Mixer No
Zones 0
19" Rackmount No
available since January 2006
Item number 184361
sales unit 1 piece(s)
Width 104 mm
Depth 58 mm
altezza 47 mm
Weight 0,4 kg
Mono Line Ins 4
Hi-Z Input 0
Phantom Power No
Aux Ways 0
Interface Input 0
Interface Output 0
Lamp Connector No
Rackmount No
110V Power Supply No
Thomann Case No
Thon Case No
Gigbag No
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43 Sales Rank
Cheap and simple mixing desk
Anonymous 04.12.2014
I was needing a mixing apparatus so i could merge various signals from different sources and the Behringer MX400 was the cheapest, simplest and smallest of all.

It does a decent job as its low in noise if you don't turn it up to 11.
The small form was a deciding factor as i can use the mixing desk on top of my synths or on my pedalboard without to much hassle.
It has a great feature that is working as a passive mixing desk if the power is out.

The building is ok with a metal chassis and the knobs feel fine.
I have used it in more applications that I was thinking of when i get it.
Sometimes me and my friends want to jam (2 guitars with pedals, a bass and a synth) and now we can all do it using just one amp.

It would be perfect if it could be battery powered but i guess you can't ask for everything at this price point and probably it would drain the batteries in a few minutes so Behringer's engineers don't give us that option.

If you need a small, well build, simple and cheap mixing desk i would recomend the Behringer MX400


Bang for the buck!
anotheri 23.07.2019
+ it's cheap and works as expected;
+ built like a tank;
+ sounds good unless you max its output (you'll get an overdrive in this case);
+ it's quite useful if you need to connect a few instruments to your main mixer or sound interface and has limited inputs on it;
+ but NOTICE! in case you want to use its output with headphones you will need mono to stereo adapter, e.g. "the sssnake 1936 Adapter".


Neat piece of equipment
DimitriosB 17.03.2017
I bought this to combine two guitar channels into one (one with effects and one clean). I wanted something that lets me adjust their corresponding volumes. So Behringer MX400 is definitely doing the trick. I would have loved if the output was stereo and panning options were available, but nevertheless this is a great product. It's actually quite solid, sturdy-made which was impressive for Behringer.


Good little line mixer for combining signals
moogkid 22.03.2020
output is mono so keep that in mind. Build is good, metal case. Knobs are sturdy. Power supply is included so it's ready to go. Works as it should. Wish it was stereo out (for headphones), but works as a way to combine audio from 4 devices.