Have thiel 3.6's. Will mcintosh ma6600 work?

As I mentioned, I like these speakers enough to warrant the $600 investment in having them repaired. I paid $800 used, so a total of $1400 for the pair strikes me as a reasonably justifiable expenditure. (Reasonable - ha!) I have since seen them less expensive on the "Gon and elsewhere, but mine were in near perfect condition - the grills were re-done a year before I purchased them. They're my favorites so far...quite amazing. My Pass X150.5 is a good match - I just picked up an Audio Research SS Preamp with balanced connections and I can't wait to see what happens.

zd542, Typically as a speakers impedance changes so does it's sensitivity. The Mac's use of autoformers compromises the advantages of quality high current ss amplifiers to maintain linear frequency response.

Oblgny, I agree the 3.5's are worth repairing. IMHO, they have always been one of the top value speakers available. Your Pass amp is surely a lovely combination with them.
Still, $300 seems a bit steep. Though perhaps a bit back in time; I'd hazard a guess they didn't cost too much more new. A simple rebuild shouldn't cost that much.
You're right to question those e-bay sellers regarding the drivers being sold as OEM. Though back then Jim Thiel used outside sourced drivers, they were modified to his specifications. Off the shelf manufacturer drivers though similar, are not exactly the same.

At least Thiel still offers rebuilds, and I'm comforted to know that they'll be in the hands of the mfr. I agree with $600 being somewhat extravagant for the pair, but I suspect they might have been over-driven by the previous owner occasionally so...
From what I've seen on here and other sites used Thiels generally fail to sell at first, even at bargain prices. One can argue that my $850 plus the forthcoming rebuild + $600 is an iffy expenditure, but within my budget I have yet to hear something as good as these. i've seen their cs 5 on here for less than $3k....tempting!

^I completely agree!
I've been tempted too, but then I remember the cost of amplifying those 5's!