I have a set of 7000's running right now (written listening to Etta James' Mystery Lady CD). garryp is right, vocals ARE terrific. I've got them pared with a Velodyne ULD-18, the last of the MUSICAL sub-wofs they made. Wonderful paring.
I admit my amp might not be of the highest quality but it drives them nicely for me. --- Pre-Amp Sony TAE-9000ES Power Sony TAN-9000ES.
I've got them bi-wired with Kimber cable -- Blue/Grey/Black woven.
It's said that the ribbons can be difficult to obtain flat response from.
Also agree with 'garryp' about directionality of the ribbons. Encourages me to sit in the "Command Chair" with a glass of 'Grape Juice Plus" and do serious listening.
Thought I was the ONLY guy still running these!
Tim
S.F. Bay Area, California, USA