I received this headphone yesterday,
Right out of the box the DT-150 sounded far from neutral. The mids sounded elevated. But ... the reason for this was not difficult to find. I have been continuously using the Beyerdynamic DT-770 pro 250 for the last six months or so. And, how much I like the DT-770, it is definitely NOT a neutral headphone. It has elevated bass and highs. Not in an unpleasant way though, but it has this much talked about V-shaped frequency response. As could be expected, after some hours of acclimatization the DT-150 sounded different, NEUTRAL! This is how your brain can fool you. It sounds neutral to me now. It delivers great detail and good instrument separation. It does produce the biggest soundstage, but for a closed headphone it is impressive. Listen to 'The Virtual Barbershop' at youtube and you will get my drift. While being a very good instrument for studio work it is also a very musical headphone. But beware: it is fairly unforgiving when it comes to low quality recordings. Alternatively, if you listen to magnificently recorded material like Diana Krall's S'Wonderful, you get an impression of what the DT-150 is capable of. The DT-150, neutral? Yes. But this headphone also has a character of its own, and did surprise me in a pleasant way.
Comfort wise this headphone may have a small problem, though. The leatherette earpads become a bit sticky and itchy after long listening sessions. On the other hand, they fit my fairly large head and ditto ears perfectly. Clamping force is moderate and more than acceptable for a closed headphone. An option is to install the velours pads of the DT-100. I ordered and received these as well and have to see what they do to the sound.
Looks? Well, the DT-150 is not going to win a beauty contest, although it is far from an ugly design. It is sturdy, and has been built to last. All the same, the finish is not great. My sample has a scratch on one of the earcups. But as it doesn't catch the eye I will not return it for another.
Money wise you could hardly do better than buying the DT-150. You get a LOT of headphone for not too much money. I have listened to a Beyerdynamic DT-880 premium. Although it is tricky to compare an open headphone to a closed one, I should say that the DT-880, at almost thrice the price, does NOT deliver a ditto extra performance. They sound better, but not much better.
Theo Mestrum, Holland