One thing I've noticed right away is how nice the imaging is with these. They sound like an open can. The instruments and in particular the vocals are positioned perfectly in my head. Makes the HE500s sound positively distant in comparison. I've been so focused on the mids and highs (that was my biggest worry) that I never mentioned the Bass! It's just what you'd expect from Ultrasone. Big, deep, tight, and punchy.
The best Bass texture I've ever heard in a headphone comes from my HE500s. These are not that far behind. You can hear all the layers and textures, and THAT is not something you can say for too many headphones. It's one of my holy grails for Bass and this one does it better than any "Basshead" Can I've ever had, and I've had a few... If you (like me) are thinking this is anything like the Pro 900, I can tell you it's not. They are so different, if not for the Bass, you could think it was from a different company. Even the form factor is very different. The 900s are a lot heavier for one thing and while the Bass is similar, I wouldn't say it's exactly the same. These seem to extend down a little further and have a bit more Sub Bass in comparison. Mids and highs on these are very refined. Detailed without being harsh and nary a trace of sibilance. I'm actually surprised by how good the mids and highs sound, and I think they got the balance just right straight from the Factory. I have not felt the need to EQ these at all. The Tonal balance is, as far as I'm concerned, perfect. They nailed it. Which is nice, because I prefer not to use EQ if at all possible. .
Anyway, it's still early, but so far they sound great and Im happier and more relieved by the hour. It will be worth a thousand bucks just to finally be happy. These are better than I dared hope to be honest. It's been a long search with a lot of disappointments along the way. I was preparing myself to not be "thrilled", but so far they are surpassing my expectations. Really looking forward to giving them a thorough test.
Glad you're really enjoying them. Seems like this is one of the few cans at the summit of the basshead headphone club.
Anyway, you say that they are quite different from the PRO 900. I love my PRO 900s, but it's got a strong treble presence that is results in a somewhat sibilant sound. In comparison, are the Signature DJs more balanced, but with an equally strong bass presentation? I think that's something that's intriguing, as I feel the PRO 900 with an attenuated treble is actually a very good headphone for bassheads.