Thiel Owners

@thoft,
Hold on. You might not actually prefer these to the 3.5’s. The 3.5’s will actually play deeper in the bass and do so with greater cohesion. The 3.7’s are better at dealing with the lobbing issues, both are more dynamic, especially the 7.2’s. The cost of amplification will certainly go up with either. On the other hand, replacement parts are much more available than are for the 3.5s.

The BHK 250’s :
https://www.psaudio.com/products/bhk-signature-amplifier/#tab-specs
aren’t rated into 2 Ohms, being " 2 Ohm ....stable into musical transients" only suggests that the amp won’t go into oscillation when temporarily confronted with such a load.

Same for the M700’s:
https://www.psaudio.com/products/stellar-m700-power-amplifier/#tab-specs
Class D amps are not typically comfortable with sub 4 Ohm loads,

The BHK 300’s seem up to the task, but not especially enjoying it:
https://www.stereophile.com/content/ps-audio-bhk-signature-300-monoblock-power-amplifier-measurement...

These later Thiel’s don’t just visit these lower impedances; they live there:
https://www.stereophile.com/content/thiel-cs72-loudspeaker-measurements
https://www.stereophile.com/content/thiel-cs37-loudspeaker-measurements

@Thieliste has given excellent advice recommending some of the best amps for these speakers. The Momentum amps jump to mind as well. The Gryphon’s are probably the best amps I’ve ever heard, but the are not inexpensive(!), and the US distribution has been inconsistent in the past, new ownership seemingly following the originators design philosophy might change that, but the possibility of having to ship these heavy amps back to Denmark is a bit daunting to me. The Krells seem to need to be recapped a bit more often than some others and that’s not cheap either, though IMHO worth it.

The Luxman specs are somewhat ambiguous.

That ambiguity is why I’ve been going to YouTube videos with the amps present in them and asking questions.

On the other hand someone on the adcom fb page says their 5800 is powering polks that live in the 2 ohm range just fine

It might be true. But, you know what they say about opinions. Unless, one really knows the listener and their perceptions and their experience, or there is consensus from an adequate sample size, I suggest prioritizing the objective information first. If an amp manufacturer can deliver the goods into a low impedance, they will brag about it. On the other hand, specs and measurements are only prerequisites for narrowing down the suitable prospective choices. After that, there are elements of the sound that at this time escape those criterion. I suggest dealing with what we do know before venturing into the unknown. Not doing so is tantamount to traveling to an unknown destination in the dark.

BHK300 will be ok with 3.7s but a good used Diablo 300 is still the best option IMO.Gryphon has now very good distribution in the US with Philip O'Hanlon.