Luckily I wouldn't be bothered by the weight unless we're talking Audeze LCD-XC weight, which might be problematic. The folding would just make it more convenient to put in a bag or so on trips. Once the Urbanite comes out and I get a chance to test it, I might break down and get myself a real basshead then. The SZ2000 is a CNT headphone, right? If so, I've always wanted to hear a serious attempt at one.
Yeah, JVC use carbon nanotube drivers in a lot of their headphones, I'd expect for their robust strength qualities, but not exclusively to the SZ2000 or 1000
Whilst using CNT material drivers are good choice of materials, it's the Kelton method design approach applied in each earcup with separate chambers and other complicated features I don't really understand the physics of that apparently give those headphones their immense bass capabilities. Apparently, from JVC's site, the Kelton method is usually found in floor speakers which I guess gives a good indication of what they were looking to achieve - floor speakers for your head - lol.
The thing with the SZ cans is the stock sound signature is relatively tame and less bassy than something like the M-Audio Q40's stock signature, but the SZ's have amazing response to EQ, so much so that it can EQ bass harder than you could comfortably enjoy it for any prolonged period of time - the headphones literally vibrate your head into a jelly
Sennheiser make claim of their new urbanite's as having "massive bass", but massive bass to one man like you have already pointed out, is different from one person to another, as exampled with the SZ headphones, you may find your ideal bass level with the urbanites with applying EQ to it - or not.
LOL
http://www.head-fi.org/g/i/1187717/sennheiser-urbanite-massive-bass/
Not sure what size drivers are in the on-ears or XL Urbanite models?
Which one out the two appeals to you at the moment?
These models of urbanites interest me for various reasons as for one, Sennheiser are a prestigious company with a solid record of producing world class healphones, two, it's a bass orientated headphone, which is a preference to me in general but not exclusively and three, Sennheiser are unashamedly going for beats mass market which is the largest market for headphones there is, so you would expect Sennheiser to have spent quite some time in developing it as it may well be their most important model in their long history despite it appearing to the audiophile community that they are dumbing down and going mainstream with this model.
Very significant and interesting for sure