Amp upgrade for Thiel CS 3.7

Hi everyone,

At the moment i am using a Classé CAP-151 int amp to drive my Thiel CS 3.7
The amp is doing ok but a much bigger amp would obviously be more appropriate to drive my Thiels.
I've seen a very nice Krell FPB 700CX  for sale at a reasonable price.
Would that be a good investment or not ? would it be overkill ?
Let me know what you guys think.


B5b450ad 8377 4fe3 83d0 be5c17500604thieliste

Showing 9 responses by thieliste

I've gone through most amps available on the market in the past few years and i came to the conclusion that the best one of them all for Thiel CS 3.7s is the Gryphon Diablo 300 by a wide margin.For any future Thiel CS 3.7 owner i've done the job for you, just get a Diablo 300 and don't look back.
By today's standards it is much better to choose a used Diablo 300 vs an old Krell 600, unless you absolutely need separates.Quality vs quantity.
Thanks guys for your input.
I also think the Krell 700 is overkill, very big and runs very hot!
I've red that many CS 3.7 owners found that the best amps for this particular speaker are the Conrad Johnson Premier 350SA or the McCormack DNA-500.
Both of these amps are difficult to find used...

michaeljbrown, how do you like your CS 6's ? i was thinking of purchasing a pair since prices are pretty low used.
Before that i need a bigger amp.

jafant, what thiel speakers do you have, i remember we spoke together on the forum last year i think.

Cheers Thieliste

One other thing, at the end of the month i will have the opportunity to listen to the new Mark Levinson line up : the n° 526 preamp, the n° 536 monoblocks and the n° 519 audio player.
I'll let you know what i think.

I'm sorry for what happened to you CS6 that's a shame!
Hope you will get them fixed properly.
Looking forward to your experience on your CS6.
I've seen a very nice pair for under 3000 $.


Really happy for you that you were able to grab a pair of CS 2.4SE.
These are beautiful and rare one the used market.
Wish you luck on completing your reference system.
The Mark Levinson n° 585 is actually a verry good match for the CS 3.7, i know someone who has that combo.
I just ordered the n° 519 network player to replace his Aurender.

I'm not going to buy that Krell 700cx, it hasen't been recapted the owner told me.

I've been speaking to Steve McCormack lately and he sumitted me the idea of his latest reference system SMC Audio as an option for me.
Looks like he's making some very nice gear with his new company.
I'm considering this option seriously.


There is no way old Krell design could compete with todays Gryphon gear in terms of sound quality.Gryphon was most likely not available in the US when Jim was still alive.At the time it was either Krell or Bryston you didn't have much choice for Thiel speakers.

3.7s are not made for very large rooms, you loose all the bass.People with very large rooms will look at more suitable speakers for this size room.

No you don't need more power, taste is another thing.
Jim would have been blown away if the Antileon Evo existed at the time he was designing the 3.7s.