Soft ear pads and adjustable, sliding, earpieces together with a very flexible coiled cable ensure listening comfort during extended periods of use.

Although they have advertised 250 Ohms impedance you average smartphone can drive them pretty well to painfully strong sound pressure level. The caveat however is that if you pair them with a simple amplifier you will unleash the beast <1KHz. I was pleasantly surprised when I first tried them on my phone, then thrilled on my audio interface Komplete 2, finally the HA4 "KOMPLETED" the circle of audio pleasure. I compared them directly to Custom One Pros, Marshall Major and K-701 all four driven from the same source - Komplete 2 + HA4. I equalised the volume to the best of my perception and the DT 990s wiped the the floor with the competition. DT990 Pro revealed its full glory in this test. Horizontal and vertical space became filled with the joy of good sound. Of course, high frequencies are in front too. DT990 has simply too much of it. But at least it didn't hurt my ears. As with all beyerdynamic professional studio headphones, the DT 990 PRO headphones are handcrafted in Germany. The materials and component parts used are made by hand and can be replaced if necessary. Specifications

beyerdynamic’s DT PRO headphone series has it’s roots in the early 1980s. Since then, millions of audio professionals from all parts of the world have become loyal users of beyerdynamic products. The second test was with a variety of genres, from Jazz to Ambient, Pop, 80's etc. Here's where "the fun" started. I tried a bunch of reference music for audiophiles out of curiosity (I'm not one of them!). I wouldn't recommend DT990 Pro for casual listening. Most of your favourite songs may be unbearable to listen to. Besides that, as long as you can still hear a high frequency range up to 16kHz as I do, this part of the spectrum will be always taking the space and in front position.

My first impression when I played some music was like: "My ears! It hurts!" because of the amount of high-frequency content. This was the reason to do the first test with high-frequency rich genres like Trance and Techno. Now that I'm wearing these headphones for 6-8 hours a day I do begin to notice the weight but it is not neccesarely disturbing.The reduced weight of the diaphragm and moving coil result in a similar pulse characteristic as electrostatic headphones, and in combination with a carefully tailored frequency response offer a natural and balanced sound. The series has been designed to cater for listening in a wide variety of environments, thanks to different headphone construction.

The DT 990 PRO is an open dynamic headphone of exceptional quality suitable for the most demanding professional and audiophile applications. There are fundamentally two differences between the models. Firstly, the Edition models have a softer headband for enjoying music at home whereas the PRO headset has a slightly firmer fit. Secondly, the Edition models come equipped with a straight cable whereas the PRO models come with a coiled cable. Made InGermany And well they do. I use them daily for the computer usage I described earlier. For a while I took them to school which they handled perfectly. They're sturdy with a metal frame but just light enough that long time wearing is still comfortable.The hd-650 sounded like the 990's if someone put an equalizer on them that turned down every frequency past 3khz down 3-6db.