What Class D amps will drive a 2 ohm load

The output impedance of almost any class D amp is so low that doubling power as impedance is halved is no problem, even into 2 ohms.


The limitations are current capacity in the output section, current capacity in the power supply, heatsink capacity and finally issues surrounding the output filter. Its likely that the latter will be most problematic, which is why self-oscillating is attractive since it will allow the amp to correct for phase shift induced by the filter. Getting output devices that can handle the current is academic at that point- its all about how far you want to push it in the design- you face most of the same constraints you do with a class AB amp.

With this Bel Canto e1X, even the 8ohm to 4ohm is a tell to what the 2ohm wouldn’t/couldn’t do grunt wise.
That wasn’t even considered to be measured as it would have fallen flat on it’s face like all Class-D’s do that I’ve seen, but at least it's stable into 2ohms and won't blow up. (so is a Nad 3020)
340Wpc into 8 ohms
530Wpc into 4 ohms

Hi Dsper,  While I am hesitant to chime in here, for fear of attack, this is what I think I know:
I replaced my Classe CA-2300 (an amp I  Ioved) with Mola Mola Class D Kalugas.  They drive my Revel Ultimate 2 Salon 2's, a speaker not super easy to drive.  The Kalugas are more dynamic, better bass control, faster, as well as more resolved on the high end.  I honestly heard sounds I had not heard before, with no compromises to me.  I compared back and forth several times before absolutely deciding the Mola Mola's were better to my ears.  I previously had rejected Class D amps (PS Audio).

Here are their 8, 4 and 2 ohm specs:

PERFORMANCE

400W/8 ohm, 700W/4 ohm, 1200W/2 ohm
Gain: 28dB
Unweighted Signal/Noise Ratio: 128dB
Distortion (THD, IMD): <0.003 % (all frequencies and power levels)
Input Impedance: 100kohm
Output Impedance: <0.003 ohm (DF>4000), all frequencies
Bandwidth: >50kHz

I have since added the Mola Mola Makua with onboard DAC and all I can say is wow and the WAF is off the charts.

These are not inexpensive Class D amps by a long shot, but are both aesthetically and sonically stunning. 

If you are near to Maryland, stop by for a listen!

Ken

...falling flat on my face now...but at least I can still listen from this position!

Here are independent 8 and 4ohm tests done at 1% distortion and 10% distortion, 2ohm test mysteriously missing.
https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1554:bhk-labs...

No better than any other of the better class-D’s around
Cheers George