Current 1508's are SVC 4ohm, although i've heard talk of the 1500series coming in DVC, DDphil would be able to tell you for sure.
http://ddaudio.com.au/#/PRODUCTS/SUBWOOFERS/DD1500I've got a 1508 thats been sitting around not being used for a while, only thing is i took the DD sticker off the cone, prefer the plain black look myself

. Lived its life powered by an M3, never pushed hard, PM me if still interested.