Mark Levinson amps works really well with Thiel's. My ML334 and my CS2.4's can really sound magical. I've heard that amp on a pair of 3.7's as well and amazing doesn't even start of cut it...
Other amp that I've heard with 3.7's were a pair of McIntosh MC1.2kW's. Really, really nice, but oh so expensive.
Other amp that I've heard with 3.7's were a pair of McIntosh MC1.2kW's. Really, really nice, but oh so expensive.