Behringer MICROMIX MX400 Ultra Low-Noise 4-Channel Line Mixer, Black

I needed something that would allow me to connect multiple instruments to my Boss RC-1 looper pedal so I could layer them all on the same pedal through the same amp. I've bought a few Behringer guitar pedals before, and I've had mixed feelings about them. They were really cheep and sounded good enough, but were made of flimsy plastic. This mixer is a different story. The housing is metal and everything feels sturdy, very impressive. Basically, the mixer has 4 mono 1/4 size input jacks and 1 mono 1/4 size output jack. It requires a 12v power adaptor, but it comes with one, which is really nice. The included power adapter did feel a little flimsy, but it works fine and only takes up one outlet space. Setup was easy, I was able to connect my drum machine, synthesizer, guitar, and bass, to the mixer. I do wish that the input jacks were more spaced out though. Really, the only cables that are going to fit are ones with straight connectors. I had a lot of trouble with my right angle patch cables, they didn't fit. I made it work, luckily I had some straight cables. The mixer works really well, sounds good, etc. I do wish it had a power switch, it's a little annoying having to unplug it every time I want to turn it off, but I can't argue with the price and build quality. I did notice that my guitar and bass sounded really nasty when I turned the volume knobs on the mixer up past 50%, but that may have just been the nature of the instruments and the presets on other gear in my setup. Those instruments sounded fine when the mixer knobs were kept low and other volume knobs elsewhere were turned up. Overall, Behringer really outdid themselves with this little mixer. The price is unbeatable and it works just as expected. It's really great to have this tiny thing I can stick onto the side of my pedal board instead of having to use a huge mixer board. Definitely would recommend.

[I'm adding one more edit to my review: Because Amazon lists both the mono mixer and the headphone splitter versions of this product as drop down selections when purchasing, reviews are all over the place. I'm not sure why this is but these products are total opposites in an audio signal chain. It really is insane, one version mixes down 4 mono signal inputs into 1 mono signal output (creation side) and the other version, I assume because it isn't what I bought, splits 1 stereo signal input into 4 stereo outputs (listening side). So, do you need to mix 4 instruments into one source or do you need to allow 4 people to decide how loud they want their headphones? lol] I bought this to use as a sub-mixer for my Behringer 1202fx mixer because I needed more inputs for all my synthesizers. It works as I expected it to. One of the pots feels a little gritty but it works fine (no noise.) Some reviews are complaining about using it with TRS connectors... well this is a mono mixer you need to use plain mono 1/4-inch TS instrument cables. I do run a Korg Volca FM and a Bastl Microgranny through it but I use 3.5mm-TRS-to-1/4-inch-TS cables to do this (bc while those synths output 3.5mm stereo it is just mono sound on L&R channels so nothing is lost.. as far as I'm concerned). Otherwise most synths output with mono 1/4-inch-TS so if you are willing to mix down multiple mono signals into a single mono 1/4-inch-TS (instrument cable) this is the piece of gear you need. My other use for this box will be to run my 2x Moog Mother-32s and a Moog DFAM into it and output to any guitar amp for an easy on-the-go use (watch your gain staging here though because guitar amps are expecting a tiny-tiny signal from guitar pickups not line-level like this outputs. keep that amp volume low low low). So in short this mixer is perfect for git-er-done mono signal combining. I can't speak to the long term durability of this unit but it has metal housing, it works now and it is cheap as dirt.

This little box works perfectly. I wanted to run a microphone through my amp along with the guitar so I had vocals as well. I did not want to buy a PA system so thought I would try this. It works MUCH better than I would have hoped. I plugged my electric guitar into one of the channels, then my microphone (I needed an adapter that turns a common 3-pin XLR terminal into a 1/4" jack plug so I could plug it into this mixer) into the next channel. Then a normal guitar cable from the mixer into the amp and presto - instant PA system! I could sing and play at the same time and it all sounded fantastic. The reverb from my amp sounded perfect both for the guitar and the vocals - I did not change it at all. Each channel on the mixer has an independent volume control so you can blend the sound level of the vocal to be the perfect match for the guitar volume. The mixer itself is very well made and the results are better than I hoped for. I am extremely pleased and would replace this instantly if it should fail for some reason but it seems high quality and no reason to think it would fail. It's also very small so easy to mount with strong velcro strips to the top or side of your amp so you don't have it sitting on the floor moving around as you move your guitar. Highly recommend this little wonder.

I use this as a mono summing box. I'm using a high quality DJ mixer with RCA outs, with unbalanced 1/4 TS adapters to my crossover. I use 2 amps, one high, one sub. I send a R unbalanced TS and a L unbalanced TS to the top (high) amp, BUT, I use this little mixer to take the R/L unbalanced 1/4 TS connectors to a single Mono TS out into my bottom (low/sub) amp- which is mono-bridged. So, I have stereo above 400Khz to my 2 ways and mono to my subs. It works fabulously, as in mono bridged mode my bottom amp works about the same, but with a bridged-mono 'push/pull' mode that makes the subs hit harder. As a side note, I understood this little mixer to be attenuating ONLY... That's not exactly right. The potentiometers move from 0-10, and there IS some line-level gain over the setting of 5. Setting 6 and above will result in a gain 'hum' that isn't there absent this mixer... at least it does in my setup. Turning the pots down to 5 eliminated the hum and worked as a perfect summing box. If anybody has an oscillator, I'd live to see exactly where I can tune the pots to the exact line level to neither attenuate nor gain. Anyway, I'm VERY happy with this purchase, and the unit is made with high quality material and the pots are high quality. Ordering and shipping were typical of good quality Amazon service.

This is a great little mixer. It's tough (I already dropped it 3 feet onto a wood floor, no damage), and it's quiet. To save you looking it up, the nominal input impedance is 4.7K, the output impedance 80 ohms. This will match up with pretty much any other electronic amps, mixers, or strange boxes you might put downstream. Note that with solid state components "impedance matching" is not something you shoot for. What you want is low impedance outputs feeding high impedance inputs, which is referred to as bridging. In this context "high" usually means kilohms rather than megohms. Those who speak of noise problems might do well to check their connections, especially the way their shielding and/or grounding are arranged. Not just in this mixer, but all tiny-black-chip electronic components are virtually noise and distortion free in audio applications. It's the nature of the beast. You might want to check my own note 2 below: this is a line level mixer. But note two points: 1. It's mono, not stereo. 2. This is a line-level mixer, and "line" means a nominal one volt. "Nominal" because the voltage actually varies all over the place, but one volt is the planning number. Generally, most things that plug into the wall, or are battery powered output line level, even if by another name. This includes most headphone outputs, including those on keyboards--though of course I don't know about your equipment specifically. Importantly, this is not a preamp, not an amp, and most certainly not a microphone amplifier. Most mixers have a small amount of gain built in and the MX400 is no exception, but it's not nearly the gain most mics require. If a mic all by itself does happen to work with this or any line-level mixer that's fine, but it's just luck. Used for what it is, a tough, quiet, inexpensive, no-frills line-level mixer, this thing shines. No wonder they can't keep them on the shelves.

First off, I am no musician or audiophile. I was looking for some way to hook up 2 passive mics to 1 guitar amp for karaoke. Originally, I bought a regular 2 way splitter for $10. It worked ok. But there was a good deal of loss from both mics. It was like each one only had half of its usual power. Then I read online where someone suggested a cheap 2 or 4 channel mixer for just such a problem. I got this and it worked perfectly. Each individual mic can actually have even more power than if only using one plugged directly into the amp. There is definitely a good deal of gain if the controls are turned up past the half way point. What is nice too is that I can keep the backup vocals mic set a little lower than the lead mic. I'm sure this would all work just as well with 3 or 4 mics too (though I have not tried it). I have to say that there is sometimes a little, low hum coming from the amp when this is plugged into it. But it isn't even noticeable when the music is playing. Very pleased.

Quality was acceptable. I was a bit upset because you have to really read into this item to determine that the four input channels are Mono and not Stereo. If you are looking to plug 4 stereo feeds into this and get one mixed stereo feed out, you will be disappointed. This is only capable of 4 mono or 2 stereo input. I would recommend the JUST MIXER 5, which has 4 stereo input feeds as well as a separate bluetooth audio feed. It also has dual outputs, so you can send mixed audio to two separate sources and control their levels separately.

UPDATE turns out the buzzing was because I had the Bluetooth adapter plugged in to the power while playing music. The sound isn't the greatest but it works for my needs. My passengers are enjoying karaoke in the car. ________________________________________________________________________ ORIGINAL REVIEW I really wanted to love this unit and give it a raving review but I simply can't. I drive for lyft/uber and I want to make my passenger's experience one they won't forget. Maybe the problem is my setup so my review is based on how well it worked for my needs. I have 3 mics and one Bluetooth receiver going in to the mixer and one auxiliary cable out to the aux input of my vehicle. When I plug the unit in to my aux input, the music quality is significantly reduced. The sound is significantly lower on the passenger side (front and back) and the quality of the music is terrible BUT it gets the job done. Passengers are just happy to have something they can enjoy during the drive. I've tried to troubleshoot in various way. The problem is from the unit in to the vehicle aux input. I don't have this issue when I plug my Bluetooth receiver or my tablet directly into the vehicle aux. The problem occurs when I plug in the mixer. I've tried different cords and different stereo & mono connectors and there's no improvement in quality. I also bought a ground noise loop isolator and there seems to be a slight improvement but nothing to rave about. I give it 3 stars because I'm grateful that I can provide some enjoyment until I find a better unit.

Der kleine Mono Mixer macht was er soll. Die Qualität ist Hardwareseitig sehr stabil und haptisch gut. Die Regler gehen mit angenehmen Widerstand und sind stabil montiert, sie wackeln nicht. Die Ein- und Ausgänge sind für MONO-Klinkenstecker mit 6,3mm. Ein passendes Netzgerät liegt bei. Die Audiosignale werden unverfälscht und nahezu rauschfrei übertragen. Er ab ca. 3/4 offener Reglerstellung beginnt man sehr leises Rauschen wahrzunehmen. Das ist ein MONO Mixer, der LINE Signale mischt und MONO ausgibt! Wer Stereo braucht kann 2 davon verwenden (Für Links und Rechts jeweils einen MX-400). Das funktioniert gut und zuverlässig. Der MX-400 ist extrem klein und leicht. Fixierung funktioniert mit „Uhu Patafix“ (dann bleibt er wo er ist, lässt sich aber leicht wieder entfernen) oder mit selbstklebenden Gummi/Silikonpads. Diese lagen zumindest meinem bisherigen zwei Exemplaren nicht bei. Fazit: Kaufempfehlung wenn man weiß wofür. Tipp: Unterschiede der Signal-Pegel von LINE, Instrument und Balanced bzw. Mikrofon googeln.

He comprado varios y los usamos entre varias personas de forma intensiva a menudo y han dado cero problema. Es muy práctico y sencillo de usar. No hemos tenido ningún problema con ninguna de las fuentes de sonido que hemos conectado (móviles, micros, etc...), ni con los dispositivos de salida. Muy buen dispositivo a precio ajustado. ¡Recomendado!

Great for adding more inputs to your mixer.

Amazing what a small, inexpensive micro mixer can do. It solved my problem of connecting four instruments to a single output, and now I can control the volume of each one individually. As a bonus, it also eliminated the static noise I’d been trying to fix for months. Sometimes the simplest solutions work best.

Je l'utilise pour mes pocket operator qui sortent en mono, fait parfaitement le job. Semble très robuste, boitier en métal.