LD Systems HPA 4

If you are looking for a way to split 1 output into 4, this is the tool. If you are looking for an amplification device, I would advise against this device.

Once you go past the halfway mark of the controls, noise starts to be present in the sound. Also there is no value indication. I believe the device to be at 100% volume with the control half way but there is no certainty.

Housing made of metal, the knobs and the jack sockets don't look really solidly assembled, the output is often noisy.
It requires power and comes with its power supply.
It does its job, it takes a stereo signal and distributes it on 4 separate stereo headphones out. The mono switch on the back is a helpful plus, it can be useful when tracking some live musicians that leave one ear free from the headphones.

Sound wise it's a decent box for the price, but if you have the head phones on while you plug it in it could really hurt your ears. It comes a big "pop-ing" sound when you plug the jack in. Would not recommend it if it's not going to be plugged in all the time.

Nice sound and build quality and easy to use in a small studio!
Love it

After two uses, only one channel keeps working, which is quite useless.

This HPA 4 is an inexpensive, robust and simple to use amplifier/singal splitter perfect for multi use production and band practise. I have been using it with my focusrite at my home studio and also at practise with the band straight from our mixing table, now four of us can use headphones at the same time and simultaneously listen to each other , adds a great dynamic to our practises . If you are using this to produce/master music , keep an eye on your volume levels on your DAW as it does boost the loudness signifcantly. a very handy tool.

I use it with headphones and with my E-Drums and it works great. It enhances the signal significantly even a little bit too much. It meets my expectations. Besides it has a robust casing and four adjustable headphone outputs. A little con is a lack of on/off switch.

Really good product and has a good bit of boost if you for example are taking a line from your usb interfaces phones out jack - you get more level from the signal which helps when recording multiple musicians at the same time. The only drawback is you cant get a UK plug version but with Thomann you usually get a free adapter if you order from UK or Ireland.

Really good value for money, simple as that. Sound was full and present. I use it mainly for expanding my headphone output when recording multiple people.

Might not be 1st choice if you just want a headphone amp for clarity/mixing/hi-fi listening. Felt like my Saffire pro 24 headphone output had more presence in the low-mid range.

Does the job perfectly fine. Unless you are a sucker for a brand name, this is all you need.