Top Sellers

Behringer MICROMIX MX400 4-Channel Line Mixer

Item #: 
  • Write a Review

The Behringer MICROMIX MX400 4-channel Line Mixer is big on features despite its ultra-compact size. The MX400 yields the highest sonic quality at all output levels, boasting ultra low-noise 4580 oper... Read More

Your Price:
Add to Wish List
GC Gear Card
Special Financing Offers Learn More
  Pick Up In Store
Available Now Englewood, CO (3.11  mi) See more stores

  • Pro Coverage Eligible
    Pro Coverage Eligible Pro Coverage will repair or replace your gear quickly and get you back playing, gigging and recording as fast as possible-even accidental damage from drops or spills is covered.
  • Free Shipping
    Free Shipping This item qualifies for free ground shipping anywhere within the contiguous United States.
  • Easy Returns
    Easy Returns If you're not happy with your purchase, we give you 30 days to return it for a full refund or exchange.

The Behringer MICROMIX MX400 4-channel Line Mixer is big on features despite its ultra-compact size. The MX400 yields the highest sonic quality at all output levels, boasting ultra low-noise 4580 operational amplifiers for outstanding audio performance. These are the same op amps found in its much bigger brethren.

Expanding on the capabilities of standard-size mixers is where the Behringer MX400 does extremely well—for example as a sub-mixer. If you are running short on available channels on your big mixer and need to bring the output of 3 different keyboards into your mix, you can simply connect them to the MX400, work out the keyboard mix, and connect the Behringer MICROMIX MX400 Line Mixer's output to a single input on your main mixer.

  • Ultra-compact 4-channel line mixer
  • Highest sonic quality even at maximum output level
  • Input Level control for each channel
  • Ultra low-noise 4580 operational amplifiers for outstanding audio performance
  • DC 12 volt adapter included
  • Input
  • Type: 1/4" TS connector
  • Impedance: min. 4.7kOhms
  • Max. input level: +16dBu
  • Outputs
  • Type: 1/4" TS connector
  • Impedance: approx. 80Ohms
  • Max. output level: +16dBu
  • Power Supply
  • (external power supply, 12V / 150mA)
  • Power range: USA/Canada (120V~, 60Hz), China (220V~, 50Hz), U.K./Australia (240 V~, 50Hz), Europe (230V~, 50Hz), Japan (100V~, 50/60Hz)
  • Dimensions
  • Dimensions (HxDxW): approx. 1-5/6" x 2-1/4" x 4-1/16", (approx. 46.5mm x 57.2mm x 103.6mm)
  • Weight: approx. 0.38 lb. (190 g)
1 year warranty. 3 year warranty if registered within 90 days of purchase.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews


by PowerReviews

(based on 8 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers

Sort by

Displaying reviews 1-8

Back to top


Perfect little mixer for live applications

By Rob Tracy

from Julian, Ca

It's well-made with a solid metal frame and the knobs are a good size and turn with just enough resistance. There is no hiss whatsoever, and if you purchase this item from GC you WILL get the correct power adapter for use in the United States. I had read the reviews for this product on Amazon and many people were complaining that it came with a 220 adapter, not the case when you order it from GC. I lead worship at my church, and when I play in outdoor situations or out of town, I play through my Crate CA-125 - using it as my monitor and running a mixed signal out to the PA system. This little mixer works great because I can add extra microphones or instruments to my single auxiliary input, it works like a charm and is very simple to use. It's pretty small and I use it on top of my amp, with the inputs fed into the back of it through the amp handle. It stays put and the controls are within the same reach as the amp, perfect. Anyone else who is singing or playing with me can just dial in their level with the turn of a knob (very useful when not everyone you play with is tech-savvy). This little mixer is exactly what I was looking for, I can't think of a single way it could be better, and the price is definitely right.

Comment on this review


For multiple guitars in a musical pit band


from Caldwell NJ

Hard to beat price since a floor ABY pedal for only 2 inputs is $50. Used it to input 2 acoustic guitars (1 nylon w/ live onboard electronics, 1 steel string acoustic w/ old non-live Bartolini sound hole pickup) into one of the 2 inputs on a small Acoustic 100 amp. Seemed to work as needed. Like the small size-it can sit on top of the amp against the handle. I like being able to lean over and quickly turn the volume up or down by hand (vs. another foot switch since floor space is limited in a pit band, and I have an electric-cheapo Ibanez flat green banger- into a Digitech RP500, into the 2nd front input. Wish: carrying bag, battery power (it's a.c.), push on/off switch for each input separate from the volume pot so each input can be at a set volume and just more quickly clicked on/off. It doesn't really take any longer, but it's harder to turn the volume level to the exact level when you turn it up unless you mark it which is hard to see since it's so small. Maybe I missed other models with these features.

Comment on this review


Simple to use, nice construction

By Walter Wright

from GA

Great little setup. In fact, we actually played a gig on my first day out with this mixer where the venue had a few dead inputs on their snake and instead of a panic, we ran the keyboard right into one of the inputs (my Roland accordion and vocal harmonizer were on the other two ports) and were up and running without any rewiring. * I would suggest some velcro on the bottom of it if it's not sitting on the floor. The weight of the cables tend to pull it off what ever it's sitting on if it's not secured down...but that's an easy fix! Great little piece of hardware.

Comment on this review


Great little unit!

By Gabriel Heiser

from Nashville, TN

This mixer combines four mono sound input sources into one mono output jack. I use this to take the stereo output of an iPod or laptop and rout the signal to a single PA speaker, for playback. Without something like this unit, I would only get one channel of the stereo output from the iPod. This unit mixes the left and right to create a single mono signal that goes to the PA speaker. Very handy! It's small, lightweight, easy to use, and does the trick perfectly!

Comment on this review


Great product great price


from Hillside Il

I got this to mix my bass signal through a Sansamp VT Bass pedal and keyboards run to my bass amp. Since I don't play both at the same time this mixer was the perfect solution to run both to my amp to eliminate needing a keyboard amp or having to run the keys through the stage monitors. Quality seems good. I have other behringer products and have had no problems. So I expect no problems with this one. For the price I'd recommend anyone to keep one in their gig bag.

Comment on this review

(2 of 2 customers found this review helpful)


Best quatlity at a Great price

By Thomas Hinds

from Sacramento CA

I've been wanting this for some time, and just got it. I couldn't be happier with the performance! The sound is rich and warm with no distortion. I only needed the second channel but can't wait to use all four! If you need a simple way to expand your mic input this the right tool for you!

Comment on this review

(2 of 2 customers found this review helpful)


great little add on

By tim

from north port fl.

i own this little great little piece of equipment for adding instruments or other equipment to limited space on mixer board and is the greatest little add on feature you can get for the money.

Comment on this review

(6 of 8 customers found this review helpful)


MICROMIX a nice little piece of equipment

By MegH

from Ozark, MO

This is a handy little passive mixer/combiner for unbalanced audio signals...think karaoke or non-pro mics. If you have a few unbalanced mics and/or line-level feeds like an instrument, tape or CD player, than you have inputs on your amp or powered speaker, then this is a great way to adjust levels of each signal before combining and sending it to the amp or speaker input. This got our little group by until Mackie finally got out their ProFX12 that we had on order for 14 months, since we had some unbalanced mics we were using (under protest) at the time.

Comment on this review

Displaying reviews 1-8

Back to top

You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.