2. amps-preamps
  3. 150690-2029

What Class D amps will drive a 2 ohm load

Just asking.

I see specs into 4 ohms but nothing into difficult speaker loads (like Thiel CS5's).

Thanks for listening, 

Dsper


dsper
georgehifi's avatar
georgehifi
10,312 posts
 
Yeah your speakers are one of the greats but need a equally great amp to do them justice, especially in the bass.

Those here that say x class-d can, can not show independent test resuts that show the 8ohm wattage doubling to 4ohms and then the most important one almost doubling again from 4ohms down to 2ohms.

This is the true test to see if an amp is able to "drive" properly into 2ohms and in your case .5ohms, and not just make some noise into it.

DESPER a pair of John Curl designed Parasound Halo JC1 monoblocks will do the job nicely, and not cost much used.

Cheers George
verdantaudio's avatar
verdantaudio
1,500 posts
 
I believe the Rogue Hydra and Medusa are stable to 2 ohms.  I have the Hydra and it is a great amp.  
tom_hankins
928 posts
 
Those Thiels are monsters to drive. I owned the CS7.2 which was an easier, but still rough load on amps. The Parasound JC1's struggled and shut down a couple times even with them. I ended up with Krell FPB 650M monoblocks. Finding an amp that can control/make those older Thiels really perform at there best is limited imo. 
matiasreccius's avatar
matiasreccius
41 posts
 
I am using an Apollon NC800 SL amplifier, based on Hypex nCore NC500, with special buffer using Sparkos SS2590 discrete opamps, to amplify my Thiel CS3.7, which run almost all frequency range near 2 ohms. Recommended, sound great, no background noise whatsoever.

If you need more power consider the nCore NC1200 based amplifiers (Nord, Apollon).

The new Purifi modules should be good to go for 2 ohms too.
ricevs
1,543 posts
 

I know someone using the Icepower IceEdge modules on his Thiel CS3.7's and he can blast it all he wants.  I have tested the IceEdge module to do 1000 watts at 2 ohms.  That is a lot of power but less than half on what a JC-1 will do.

I think very old design speakers with this kind of impedance don't make sense.  You limit yourself to amps and I have no doubt there are far more transparent higher efficiency speakers out there.....Check out Spatial, GR Research, Tekton.  These speakers are very sensitive and very transparent.  You could even make some speakers for very little that would be mucho better....and easier to drive.  Almost everything I have is DIY.

BTW, the Stereophile review shows a 2 ohm load for the CS5....where does one half ohm come from?

https://www.stereophile.com/content/thiel-cs5-loudspeaker-measurements-0



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