MICROAMP HA400 Ultra-Compact 4 Channel Stereo Headphone Amplifier

I got one of these to allow my wife or I to listen at whatever volume we want while keeping the TV speakers muted so the other person can sleep. It works just as I wanted and expected it to. The only problem is that it uses 1/4" TRS jacks for the input and outputs. This is fine if you're using it with standard recording studio/musician's connectors and cables, and of course, that's the market this amp was designed for. I think the manufacturer would sell a TON of these if they made a version with RCA jacks for the input and 1/8" TRS jacks for the headphone outputs. That would match what most consumers will have coming from their TV these days and what they'll find on their headphones/earbuds. So the issue becomes finding 1/8" Female TRS to 1/4" Male TRS adapters that aren't total junk. I tried a few different ones found here, and had extremely poor results from most of them. Most didn't make a secure positive mechanical or electrical connection. It's hard to imagine how they can even sell most of them! But again, this is NOT the fault of this little amplifier, it's just something to be aware of. I finally ordered some adapters from Parts Express (a seller who does sell here on Amazon), but I had to get them directly from that supplier since they didn't seem to have them available here on Amazon. I hope I can say that on here without it being censored or causing friction. Those adapters work perfectly. They fit tight and make solid electrical contact. With that problem taken care of, the unit does just what I need it to do, and the sound quality is plenty good for TV viewing. I'm not going to say that it's an audiophile-grade headphone amp, but it's really not bad at all. Having independent volume controls for up to four people is nice so everyone can use a setting that suits them. As I said, the main use for me is so either my wife or I can watch TV without disturbing the other person if they're sleeping or talking on the phone, etc. We just keep a couple pairs of headphones and this amp at our usual watching position, and it's very handy. I've seen complaints on here about buzzing or receiving AM radio broadcasts. I suspect that in all of these cases, the true culprits are either poor electrical contact when using crummy adapters or cables OR they've managed to allow the metal case of this unit to come into contact with something that's grounded (but not well) to another piece of their equipment, thus creating a "ground loop". Ideally, you will keep this unit's case electrically isolated from anything that might create a ground loop back to your audio source. With this amplifier and your headphones "floating" electrically from everything else, you will not likely get hum or buzz. And with good, solid electrical connections (avoiding poor adapters, etc), you will likely avoid any reception of strong AM radio signals in the area. All of this would be true of any amplifier. The sound quality is perfectly fine for an amp of this price range. It drives various headphones to levels far above anything I've needed. It seems to have fine frequency response and reasonably low distortion. The volume controls move smoothly and create no static. And I've been using it for a few years and had zero reliability issues. So I give the amplifier five stars for doing what it is supposed to do quite well.

Let me start with this amp is great. It is loud and clear. This is my first behringer product ever, I didn't like behringer before but this changed my mind on some of there products (not on there mixers, I'm am a Mackie freak!) We use this amplifier to power a pair a headphones for a drum monitor and it works well, we use a extension cable (25ft) to plug them in but I am worried it could clip because it needs to be loud. It's a shame them couldn't of put a clip light on each channel but the get very loud so it isn't too much of an issue. Power: When they say "4 powerful headphone amplifiers" they really mean POWERFUL!!! I was 3 yards from the headphones and it turned it up and I could hear it pretty good for being 3 yards away so thats powerful. When you are using them in a drum application you need a lot of power and this amp is perfect. I'm worried the headphones will blow!!!! Only problem is it dosen't have a power switch so you have to unplug it to turn it off but it dose have a power light. Sound: This amp will get very lout without causing any extra hum or his. It is very clear for being a behringer product. As it says it is stereo. Connections: This amp has 1/4 trs connecters for all connections (not standard 3.5mm headphone jack you would find on your iPod or computer) If your headphones have a 3.5mm jack (like on an iPod) you will need a 1/4 trs to 3.5mm adapter like this: 3.5mm Stereo Jack To 1/4" Stereo Plug (Black) You will need a 1/4 cable to connect it. If you are connecting it to a headphone port on a computer or iPod or something you will need another one of those adapter and a 3.5mm cable. There is many ways you could connect this. Plug it into a line-level source headphone-source One mistake I made was I only had a mono cable (only using the left side) so it only played in the left side. Make sure you have stereo adapters and cables (balanced) Overall: Pros: Powerful. Clear. Lightweight. Compact. Cons: No power switch. No clip light.

The amp is pretty good. I bought this because I'm getting sound out of my monitor and it just sounded a bit weak. I just bought a new pair of Audio Technica ATH-M50 headphones, which sounded amazing over the last pair I had. But the base wasn't quite loud enough for me when listening to EDM. This little baby is perfect for cranking the music up till my ears can't take any more! I can usually listen on setting 8 for about and hour or so before I have to turn it back down to a reasonable level again. But it's pure enjoyment. Like others have said, when you turn the volume up to 9 or 10 the sound tends to get a bit distorted. But there's plenty of space on the dial for enjoyment. Other comments have mentioned the portability factor of this is not great, which is probably true. It runs on AC power that needs to an outlet. For me this isn't an issue, it sits on my desk and has enough room on the power strip for it's own plug in. I can see how this could a major issue for someone that is on the move a lot, possibly a musician type. Its' pretty small so it doesn't take up too much space. It's only 4"L x 2.25"H x 1.25"D Since i have a pretty small desk space to work with this works out perfect for me. If you're not a mixing professional audio this thing works just great in my experience. If you do studio work you probably want something a bit more expensive. I also had to pick up some cables from monoprice to get from my monitor to the amp. Just plan ahead cause this thing takes 1/4" male plugs, so you'll need a converter if you don't have one. Most headphones come with one, mine did. The one I received is silver in color and not white like in the picture. After owning this product for sometime now. I would agree with others that there is a slight hiss or feedback when you have the volume on low. It's not noticeable at normal volumes though.

I returned my Pyle Pro PHA40 micro amp that was shooting sparks at me and decided to get this instead. I am very pleased. This little amp has some kick. You will need a 3.5mm female to 1/4 male adapter if you use standard 3.5mm headphones, but that's only a $5 purchase at your local guitar center. Also, you should know I have a pair of Koss Pro 4AA headphones that have a 250ohm impedance. This amp was MORE THAN ENOUGH to power my hi-fidelity cans. I cannot speak of how it would handle 600ohm headphones but it does 250 just fine. The volume goes way up. I was literally pained when I turned the volume all the way up. I do not recommend turning up to 11 just yet. You don't want to go deaf in the first week. So a nice bonus here is the fact you can have 4 separate headphones plugged in at 1 time with 4 separate volume controls for each pair. There is however only one input source available to you. Also, my major issue was that at maximum volume this amp does tend to distort a little. That however was using some pretty low quality audio (YouTube) and I have not yet tested with FLAC files. I can say that at normal human listening levels it sounds clear and loud. One more critique is that it has no on or off switch. Its a minor issue but it would be nice to just leave it plugged in all the time and flip it on and off at will. As its manufactured now the only on and off switch is disconnecting it from the included power supply. I definitely recommend this little amp if you just need that extra punch in your ears or if you need something to drive some higher quality cans. It was well worth the $25 bucks I paid and is really the cheapest amp option out there on the market.

I added the Behringer MICROAMP HA400 to my home studio setup and it's been a game-changer. The unit arrived on time and was well-packaged. It's incredibly compact, yet provides four channels which is perfect for my small recording sessions with friends. The sound quality is impressive considering its size and price point. Each channel has its own volume control which allows everyone to set their preferred levels. This is a feature we've found to be invaluable. Setting it up was a breeze. Just plugged in my stereo mix, connected the headphones, and we were good to go. The independent volume controls on each channel are very intuitive and easy to use, even for those who are not technically inclined. The construction seems solid and durable, which is important as it gets moved around quite a bit in my setup. I also appreciate the ultra-compact design which helps in keeping my workspace uncluttered. One minor downside I noticed is that when all four channels are being used simultaneously, there's a slight drop in volume. It's not a deal-breaker by any means, but something to be aware of. All in all, the Behringer MICROAMP HA400 is a cost-effective solution for anyone in need of a multi-headphone setup. It's straightforward to use, offers good sound quality, and is built to last. I would definitely recommend it to others looking for a reliable headphone amplifier without breaking the bank.

The Behringer HA-400 is a dedicated stereo headphone amplifier that delivers a clean rich sound. When I ordered it I was converting a Klipsch Promedia 2.1 system into a passive set of speakers. The external 2.1 channel amp I bought for the speakers didn't have a jack for wired headphones. Before ordering the HA-400 I was thinking that I needed to buy better headphones or earbuds. Music sounded a bit thin, and I prefer not to compensate with equalizer settings. When I listened through the HA-400 I was immediately impressed by the sound quality that was richer and more balanced. Specifically the HA-400 delivers more low end without sacrificing the mid range and high end. I hear no loss of quality when I turn up the volume. Add to that the compact size, simple operation and low cost. I think it delivers huge bang for the buck.

TLDR; Just as a simple amp to boost signal, this works great. No hiss, static, ect. for my setup. Recently I purchased an Elgato Wave XLR. I also purchased beyerdynamic DT 990 PRO headphones to go along with it. What I expected was to be able to use the headphones with the Wave XLR. However, I quickly found out that while the Wave XLR is capable of powering the DT 990 PRO headphones, you had to set the volume on the Wave XLR to full to have a 'normal' level of volume. I really like the Wave XLR and I could have purchased and used a DAC just for the headphones, but I would not have been able to monitor the microphone with out some sort of delay. (Sure I could have also switched to a DAC that could power the headphones, but I really liked what the Wave XLR brought). Backstory over, I bought this amplifier because I just wanted a bit of boost to the headphones. This item works great for that purpose. I don't have any hissing, no static when adjusting volume, and no other apparent interference with it.

I just received this a few days ago. I'm generally happy with it, but have a few small issues. Here are a couple of details. * Generally seems to be well built and functions as expected. * I read some complaints that it pushes mono signal into the split headphones. This is definitely not the case. I get a stereo signal out of all outputs. * It seems to be true that this device does not amplify much if at all. It splits the signal into four independently controlled outputs. Max volume on any one of these does not appear to be louder than the original signal. * I do notice a sound difference running through the device vs the original headphone output. The signal coming out of the device is a bit thinner sounding. There appears to be some appreciable low and low-mid loss going through the device. * I know this is not one of the advertised features, but it would have been nice to have multiple ins as well. If you switch between different sounds sources, you may want to consider one with this feature. Again, not really a complaint, just an observation. So all in all, I'm satisfied with this for what I need. I just wanted something where I can have two or more folks listening to the mix, primarily for tracking and other "live" uses. Because of the coloration, I'll probably go directly into the audio interface when mixing and tweaking sound.