Clou Blue Jaspis for Senn HD 580/600 Headphones

Craig those sneaky guys at Headroom have them, but you have to go to Yahoo site to see them listed:
http://store.yahoo.com/headroom/headexcab.html

The salesman at Headroom says they really open sound up without sounding bright. They look really cool also, but wanted to get some independent member feedback on these
first.

Well I will answer my own question, as I purchased the Blue Jaspis for my Senn HD580 several days ago. I can tell you this the BJ will never be coming off my Senns!

The cable is a full 3 meters long, the body is bright blue and the right/left branch cables are dark grey. The cable is about as thick/stiff as TV coax cable, some people may not like this but it doesn't bother me, cable is double sheilded. Treminated in high quality 1/4 gold connector.

As far as sound, the treble/midrange is slightly more open
and detailed, yet still silky smooth. I am using Creek OBH 11 and Grado RA-1 headphone amps. The biggest improvement is to bass response which is noticeably deeper and more forceful, makes overall sound more dynamic. A very worthwile
improvement for $90 from headroom, I would recommend this to all Senn HD 580/600 owners.

I am amazed how cheap the Senn HD 580/600 can be purchased now here and other internet sites. Perhaps Garfish can let us know his impressions of his Blue Jaspis.