Behringer HD400

603 Customer Ratings
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Works like a charm
lerxtdude, 26.05.2020
In my home recording setup I am using a laptop, connected via USB to an external sound card, which in turn is connected to a set of nearfield speakers. After upgrading my laptop I started experiencing disturbing noisy/crackling sounds on the speakers (but not on the headphones), even without audio playing.

As it turns out, this was caused by a ground loop, from both the laptop power supply and the nearfield speakers having grounded power cords.

After doing some online research I came across the Behringer HD400. It is now installed in-between the soundcard output and the nearfield speakers, and with this, the ground loop problem is completely eliminated. I am very pleased with this result.

The Behringer HD400 is compact, relatively cheap, and does exactly what it advertises: eliminate hum and break ground loops. The housing looks solid.

As always, the Thomann service was great, with prompt shipment and very fast delivery to the Netherlands.
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Did exactly what I needed!
BBFPASTOR, 28.08.2020
A DI box is a simple piece of kit when it comes to using it. This wee box did exactly what it said and was simple to set up and use. Matched to stereo out to splitter cables into the box and the reverse out of the box, took care of the hum that was doing my head in.
Simple and easy to use, no power adaptors to muck with and nice and tidy to look at so no one but me will even notice it is there.
Pros; Best place to get it is from Thomann. Price and shipping were both right and fast. Easy to set up. Did what it said it would do. Worked so well that I have now ordered another for another feed into my board!
Cons; So far none.
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A studio saver!
tomatoKetchup, 24.11.2017
Weirdly enough, there doesn't seem to be any other similar devices around. As always when I buy Behringer I am skeptical until I plug the thing in and see what comes out... I have to say for this little black box I couldn't be more delighted!

It just does what it says on the tin: my Moog Minitaur/Roland JU-06/JP-08, all usb-ed on my computer do not make any ground loop noise anymore. And, contrary to what I read on other reviews, I cannot hear any volume drop and the sound is absolutely not affected at all! On top of that the chassis is made of sturdy metal, and after dropping one a few times, there wasn't a scratch on it.

At that price it's just unbeatable... maybe that's why other companies don't even bother making their own versions!
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Very happy - problem solved
sickly_b, 08.03.2021
For quite some time, my windows PC created a unpleasant background grinding / interference / vintage modem type of noise before I inserted the HD400 between my ZOOM R8 sound card and my amplifier. The difference was immediate and the unit is working PERFECTLY, creating a very quiet sound floor when I'm using my DAW or playing tunes from the desktop. One extra thing to mention - it is passive - no power is required. Just some jack plug connecting cables.
Excellent value and v v simple to use
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It works!
JxHx the Thrillseeker, 28.10.2020
It's passive but the volume drop is minimal.
Works as advertised (of course you have to know what you want it for) and feels very sturdy, I bet it can take a beating.
The only (minor) downside is the inputs and outputs are too close together.
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Final solution to ground loops!
aguidrum, 11.06.2020
I had the usual mass hum on a Imac-saffireAI-power mixer-speakers, and especially when the imac was active the noise would increase frequency.

I linked this tool between the AI output and the Power Mixer input and ...voila': problem solved!
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Magic box!
Guice, 27.07.2020
Use it with a Mooer GE-200 and Baby Bomb. They would sometimes get noisy, especially in cranked live situations. But this little box solved it completely. Dead silent!
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Probably the most amazing semi-modular synth out there.
ThanosF, 22.11.2020
This is now already a classic. The amazing tone, the design, the unparalleled possibilities in such a small device is unbelievable. For 2 years now I have been making the most crazy things with it and I have now a 15U eurorack modular system and the 0-coast is still there pushing the boundaries. Together with the 0-ctrl is a hell of a combo! Recommended to anyone who wants to start with modular synthesis.
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Eliminates GPU coil whine in speakers
robertiagar, 02.04.2021
I bought this because I had massive coil whine in my PC Speaker caused by the GPU. After I introduced this between my PC DAC and my Speakers the coil whine went away. Solid 10/10, does the job and it's a pretty affordable solution.
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HD400 Review
JesperCFC, 15.08.2013
I purchased the Behringer HD400 as i have encountered ground loops at some venues and practice spaces due to my use of the 4 cable method between a tube amp head (peavey 5150II) and an external pre-amp (digitech GSP1101).
This little device when placed in the send and return section got rid of the ground loop hum problem easily.
its small and easy to fit either in the back of a rack or ontop of an amp head
the only downside is there is a noticable drop in volume when using this product. its nothing to bad, 4dB at the most, easily cured with more volume on the amp head itself

all in all a great, cheep, effective and easy solution to an irritating problem. if you have ground loop hums you have no excuse not to purchase this product
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Fixed My Audio Issues
Ross B, 27.02.2021
I was getting a feedback buzz or hum through my monitors whenever I played video games and this fixed the issue 100$.

Definitely worth the buy if you're having buzzing or humming issues.
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09.12.2014
I suffered from unbearable hum/noise with my Yamaha HS7 active speakers, made worse by doing stuff on computer like moving mouse. The speakerds were pretty much unusable. I tried connecting the to the same outletw with computer, to different outlet, to seperate outlets, nothing helped. I bought this babt and BAM, the noise is 100% gone.

If you're considering buying this product PLEASE learn what it is for and what it isn't. I've seen some 1 star reviews on amazon from people who thought this would remove hum from their guitar pick ups... This isn't for that kind of hum! It's for noise generated by ground loop which it fixes perfectly! I know people have certain bad expectations towards Behringer gear but this is a simple piece of equipment that does it's job perfectly.
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Works as intended
OxymoRonald, 06.11.2020
When I connected my PC to my mixer it introduced a ground loop. This little box completely removes that. Very easy installation and does exactly what it says it does.
Also very nice metal construction, it looks like a proper piece of equipment :)
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Forget the expensive stuff
TC Vu, 14.02.2014
This little device solved a major problem. When I connect my laptop computer with my active studio monitor speaker a humming noise occurs. Tried an Art DTI hum eliminator - wouldn’t work. After a little while of internet research I found people recommending the HD400. Well, it does its job perfectly! Little money, great effect. If you have hum in your circuitry, try the HD400!
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BVery cheap
m00f, 11.03.2021
Gets rid of all those nasty hums.
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Still in the package
Flipper, 18.11.2020
I bought this to eliminate some humming, but the noise was already gone before I could even unpackage it. Was it in my head? Possibly it works by just being in the room! If so, it's magic. 5 stars.
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Breaks ground loops at 4 cable method
24.03.2014
I use a Randall RH-50T amp with a Boss GT-8 effects unit via the 4 cable method.
This lead to a very annoying ground loop between the guitar input and the effects loop.
With this handy device the humming stopped immediately.
Also comes in very handy on stage if any problems with humming ground loops suddenly appear.
Although I have to admit that the signal experiences a little decrease in volume when you send it through the HD400. But not by very much, so it doesn't really count as a downside.
Especially when losing that annoying hum on an instant is the big upside.
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Magically works
Pierre M, 29.01.2021
Totally removed a ground loop on ADAM T5V's caused by computer. It needs more cables but it works ! (Setup is: Computer => DAC USB => Headphone amp/ Preamp => RCA => Behringer HD400 => Bal Jack to XLR => ADAM T5V's)
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Inexpensive way for reamping guitars
Silly_Sili, 14.02.2020
I use this device mainly for reamping guitars. The signal chain is practically noiseless with this unit and it also does not color the tone much. In an AB comparison I could barely notice any difference between original and reamped track.
The device is working perfectly so far, however the build quality does not seem to be that great
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Does exactly what it says
gstjepan, 23.01.2020
I was a bit sceptical a first. It's just a small little box.
However, it does exactly what it says.
I use it to remove hum from my synth going into my mixer/recorder and it's amazing.

A true little magic box :-D
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A ground loop killing machine.
Kosh2262, 17.07.2019
like it says in the title this thing is a must have if you suffer a ground loop problem. Mine was driving me crazy until i found one of these... no more hum now i can concentrate on the music. as always service from thomann was top notch and really fast this time.... thanks thomann
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Awesome
John Mor, 17.05.2017
Killed that annoying hum i had on my trs connections.
Didn't notice anything weird happening to the sound
with this.I should buy a couple more of those for live use.
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A handy small box
OmerS, 15.06.2017
It really does what it says in the description. Any pickup noise or hum is eliminated. The unit is a passive and could easily fit to any bag. So no worries about battery or space.
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Hum cancelation
10.12.2016
Very good product for its price, although it doesn't take away the noise surpressor on my guitar pedalboard
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Worth the money
Rene Jansen, 11.12.2019
Working with 2 tube amps and had the ground loop hum. Installed this between ONE of the amps and the hum was gone. No tone suck ore anything. And its realy cheap. Perfect budget choice. Can’t find any negative points
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Behringer HD400

€24.80
Including VAT; Excluding €15 shipping
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Available immediately

This item is in stock and can be dispatched immediately.

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