This Beyerdynamic DT 990 Pro review includes the information about features and my own impression of these open-back headphones. In addition, they are wired and have an over-ear wearing style.
Let's start with Beyerdynamic DT 990 Pro specs. Its impedance can be chosen since the company offers 80 and 250 Ohm. The considered device has a pretty wide range of frequency response and produces a sound between 5 Hz and 35 kHz. Its sensitivity is not special as it is only 96 dB.
Keep in mind that your sound source will have a substantial impact on how the DT 990 Pro sounds. For example, I had a heftier bass response when listening through the headphone outputs of an Apogee Symphony than I connected to an iPhone 5s. The headphones produce incredibly deep sub-bass effortlessly. No aspect of the low-end goes missing here, and the mids and highs are perfectly clear and present.
The audio cable that you get with the headphone model is 300 cm/9.9 ft long and it will allow you to move around your room freely and listen to music at the same time. Also, the device has a 6.35 mm jack.
The headband of this appliance can be extended to any head size. Every part of the headphones is user-replaceable, and everything feels pretty robust. The two-tone filter at the back of the ear cup, and the grill pattern on top of it, both give these a classic look. One more important thing to consider is their weight which is 360 g/12.7 oz. Consider that the mentioned headphones are not foldable. Anyway, you get Beyerdynamic DT 990 Pro with a carry case. There are no buttons for control or microphone.