Brief review (very brief).
My first experience with an Ultrasone-based phone, and I like the sound, very reverb-like, solid, balanced. Some harshness on certain tracks (could be the original rips or production), but nothing too grating (and it could be that they need more burn-in). I also tried the phones with my Zune, but decided the treble also was a little harsh on some tracks, and the bass was a bit overpowering (moreso than on the Sony with normal EQ).
So back on the desktop for more burn-in (only at 15 hours right now). But I do like them.
Of course, the UL-30s are certainly designed as portable phones, much like the PX100s or Ksc75s. And just as is the case with those phones, these phones do not work if even a tiny bit of isolation is desired (though they are better than the clips on the Ksc75s, for sure). I used them on my usual early morning dog walk today, and the sounds of the city were almost as dominant as the tracks playing on the Sony.
Not a shock, of course. But to me, these have limited use in open air situations (on the beach, in a peaceful setting), and are mainly a nice inexpensive on-ear phone for sitting around at home or in quiet places.
And while this comparison may not be fair, since my Grados have 8 years of burn-in, the SR-80s (tape modded bowl pads) are preferred sound sig-wise. I just really like the Grado sound over the UL-30 sound as it stands, even though the UL-30s have a more expansive soundstage. The Grado SR80 clarity, instrument separation and treble are just superior to my ears (and preferences). Now, I am nowhere near the 300-hour burn-in mark, so I am going to give the UL-30s more time on the PC to see if they keep improving.
Especially at the intro price (deal no longer available, I believe), these are very nice inexpensive phones. I would not choose them as my travel phones due to the lack of isolation. They are comfy, and the headband seems nice and sturdy. They also have a straight plug, and I favor he L-shaped plug. I do favor them over the Yuin G2A, from what I remember, but they can't compete with the G1A in my view.
I haven't tried hooking them up to the T4, so not sure how they will respond to an amp, but I have a feeling they will improve.
For now, at 15 hours, a good purchase on balance, and I would recommend them for someone looking for this type of phone over the Ksc75s or PX100s (this is from distant memory of the latter).
I also wonder if the pads are removable (haven't tried to mess with them), because maybe they could be "quarter modded" much like the Grado SR60 pads or the Ksc75s. With some gentle tugging, the pads seem to be permanently attached, which also could be a problem if you want to replace them should they start to wear out.
Changing or modding pads has changed sound on some phones, so I am just curious if the UL-30 has the same potential.
Have to check with NuForce on it.