No direct experience with those on your original list. I have a pair of ESL-63 I am working my way thru in Seattle, very tempting to box them up and send to Kent as Whart advises as I am interested in upgraded parts.
iF you want local repairs call George at Gig Harbor Audio he has done Quad repairs. Great cantankerous dude
best
jim
iF you want local repairs call George at Gig Harbor Audio he has done Quad repairs. Great cantankerous dude
best
jim