Just a few quick impressions on this hp. I want to thank Fred for the loan...very gracious of you kind sir!!
I had no preconception about this hp going into the audition, as it wasn't really on my radar.
The Sound:
Now that I have auditioned this hp and read through most of the thread, it seems that what most people say is true...the dt150 sounds very much like a closed version of the hd650. I might revise that slight and add if the hd650 and hd600 had a baby hp that was closed, then the dt150 would be it. The reason I say that is because I find the treble more resolving on the dt150. There is a better leading edge to the notes with the 150 also.
I was really surprised by complexity of the signature and the way the music was "layered" so well. I didn't expect the richness presented like this at all.
The bass digs really deep and has purpose and texture...not bloomy at all. The overall speed is pretty good and I'd say a notch better than the hd6x0.
The mids are truly impressive though. The hd650 has been on my desk for the past five years mostly because of the reproduction of natural sounding mids. The 150 sounds as good in the mids as the 650, maybe even a touch better. I'd have to spend more time to truly get an appreciation of how good the mids are. Female vocals are impressive with this hp.
Sound staging is better than average particularly for a closed hp. If this were in my regular rotation the sound stage would not be a disappointment. Instrument tonality in accurate and natural. Guitar plucks are nice and organic and have that "thwack" that I listen for.
The Build:
Well, here's the bad part. The 150 looks and feels like it was made in the 60's. Utilitarian and made in my garage are phrases that come to mind. The single exit right exit cable is coiled and the right exit is a deal breaker for me. The have some weight to them...about 385 grams according to my kitchen scale. But the weight is not balanced and I would call the comfort just "okay" even with the extra padded headband that came with this pair. Adjustment was iffy for me and they always felt lopsided.
The odd thing with regard to build quality is that Beyer makes some of the most finely crafted hp's in the business, yet these feel homemade. While I enjoy the sound and found it quite impressive, I wouldn't buy these due to the issues with fitment, build quality and overall comfort.
Matt