4-Channel Headphone Amp

Honestly this splitter is fantastic as far as I can tell. It's much higher quality than the horrendous HA400 / Behringer rebranded multi-out splitter amps (I own one of those). The HA400s are so terrible that, if you can't hear what they're doing to the audio quality, you shouldn't worry about any audio hardware you buy, because that's about as objectively bad as it gets.This splitter has no signal degradation that I can detect. I use it to compare multiple cans at the same time. The individual volume knobs + master is great to let you make each compared headphone have the same volume, and then change the master volume at the same time. There DOES appear to be a difference between the master all the way up and individual low, vs vice versa of individual high and master low, but only at very high volumes. The unit definitely does produce noise, but again only at deafening volumes. I can't hear any added noise to the signal at loud but bearable listening levels.I regularly plug all of my headphones into this, independent of the sound source. It's convenient to always have the same sized jack going to the audio source (this supports aux in and 1/4 trs which is great), and then to plug in whatever headphone cable size I want with adapters to the QH4.I don't think this unit contains $70 worth of hardware, but it's sturdy, and has held up for a while now (at least a year?) with no damage or signal degradation despite a few times i've dropped it. The knobs all feel great to turn, the base has good friction against my desk, and audio clicks and pops are minimal turning it on/off. Again I don't think there's $70 worth of physical material in here at all, but I also don't regret paying $70 for it after using it extensively.

I love this unit. It replaced a much cheaper Pyle unit which worked OK but I thought I'd splash out. I use it as part of a headphone system for late night TV watching. So far I've used it to direct feed a pair of Ultrasone HiFi 780s plus a feed to a bluetooth transmitter for a pair of Harman Kardon BTs (and some HK earbuds). Sound is great. A significant step-up from the Pyle. Meaty and with great clarity. Volume levels are through the roof so be careful of your ears with all this undistorted output.I suppose I could share my late night viewing with others due to the multiple outputs but in truth, I haven't done that yet.What more can I say? Works well, is well made. Very reasonable price for the performance level. Buy one!

Looks nice and sleek. Does the job. Happy so far.

This thing is built very very well! 30 plus your musician and recording artists with over 20 albums. I've owned every type of equipment under the sun. For a headphone amp this is it! Really good analog converters and preamps. Solid knobs and high quality jacks

I was thrilled with this product - easy to connect to my older Sony HD TV via an RCA splitter out to aux. The sound was amazing - just what I wanted for my wired headphones. There are 4 aux jacks in the front for headphones on separate channels with separate volume controls for sharing with family/friends, etc. To me, depth of sound is an important component of video viewing and this product delivered! Highly recommended!

Disclaimer: I only tried this using the 1/4 inch "Aux" headphone jack on the back, but my comment is mostly about sound quality, so I don't think this should make much difference. The main headphone-out jacks are 1/8 inch jacks on the fronts.Good things:1) It seems reasonably well built, but it feels light and insubstantial.2) It has two input jacks.3) Four output jacks on the front each have their own volume control.4) Option for stereo or mono.Why I wasn't so happy with it:I tried this amp with a Chapman Stick (an instrument like a guitar) and the tones were pretty bland. The sound quality was clear, but very quiet, and the sound quality may be fine for amplifying digital signals that are already complex (output from a radio/TV). I think the sound would be also louder from the main outputs on the front. The upshot is that I wouldn't use this for amplifying a musical instrument. It just doesn't have very rich sound quality.

I needed an economic way to add a small amp to my headphones so I could ditch an old Home Audio gear amp at my desk. I like this unit. It seems to work great, has no noise, and is a nice addition to my audio mixer.

This is the 4th device I tried to add some functionality to the headphones out from my Apogee Element 88 audio interface (the first 3 got sent back for various reasons including: too complex, not flexible enough, not enough gain, too small and flimsy, etc.).The Apogee Element series has no physical controls. Everything is done in an app on one's computer (or iPhone or iPad). While that works fine generally, when volume is too loud in headphones, it really helps to have a physical volume knob to quickly add to save your ears rather than having to reach for a mouse and find a fader on your computer screen (where it might be buried under other programs, etc.).Enter the Samson QH4 4-Channel Studio Headphone Amplifier. While any headphone amp might do (like my Mackie HM-4), the Samson is unique in that it has a stereo aux in, in addition to the standard stereo in. As my Element 88 has two headphones out, this Samson aux in feature allowed me to patch the second Element headphone out to it. So, now I can monitor two discrete headphone patches/mixes (though not simultaneously as both the main in and the aux in are on the same single internal signal path in the Samson).The sonic quality of the Samson and the gain structure are great.—transparent and balanced. The Samson neither robs the Apogee Element's pristine signal of volume, nor colors it.