Thiel Owners

@thoft Your looking to purchase 3.7s or 7.2s ?7.2s are really difficult to find and you better have very beefy amp to drive them like Krell FPB series of today's Gryphon.

thieliste

prof did an excellent job of comparing his 3.7s with his 2.7s ,

go back to about pages 40 - 50 and find his in-depth analysis .

@thieliste 450 watts at 4 ohms aren’t good enough?

@thoft, the Adcom GFA - 5800 is rated as 400 Watts into 4 Ohms:

https://www.manualslib.com/manual/206141/Adcom-Gfa-5800.html?page=11#manual

While it might very well be up to the task, one can see that it's not quite up to doubling down from 8 Ohms to 4 Ohms and there isn't a 2 Ohm rating. Unlike your 3.5's these model Thiel's have sub 3 Ohm loads:

https://www.stereophile.com/content/thiel-cs37-loudspeaker-measurements

https://www.stereophile.com/content/thiel-cs72-loudspeaker-measurements

@thoft There's no way your going to drive 7.2s properly with this Adcom, you need to find Krell FPB 400CX for 7.2s.You'd better look for 3.7s much easier do find, best amp for this model is by far Gryphon Diablo 300.I might buy a pair of Thiels for the fourth time but i still need to think about it.