The switch on the pressure on the regulator works very well and comfortable, volume can also be adjusted perfectly.
The included software is particularly the MMN absolutely useless and unnecessary by Asus itself. All settings can be made better and more directly in the Control Panel. The Dolby Profiler is good. The surround simulation works very well.
Here attention must'm not the surround sound is emulated in itself, but the feeling of sitting in a large room in which a multi-channel system is installed. Therefore, the minimum Hall. It really feels good and is just in shooters (BF 3 & 4) a stunner. Movie enjoyment is hereby also possible without restrictions.
The sound quality in general is beyond doubt. All details audible fully recommended!
Now for the headphone amplifier:
I run the DT 770 Pro 250 Ohm to this sound card and would like to make it clear that this pairing works.
The headset itself is so loud that you can just put it on the table and use it as a speaker.
As some reviewers conclude that the Xonar U7 was too weak to me is absolutely inconclusive.
This may be at the DT770 Pro is a special case, because it is so efficient in approximately 80 ohms as a receiver and therefore of the '150 Ohm strong "U7 can be fired without problems, and is certainly not at each KH way.
I want to again make it absolutely clear Xonar U7 + DT 770 Pro 250 Ohm WORKS! Until the sudden hearing loss.
For the price you get a well-made, very functional and powerful external sound card that does not have to hide also in terms of sound quality.
Strong buy recommendation!