What Class D amps will drive a 2 ohm load

It's been reported that Jim Thiel ended up using Krell 600 Watt'ers.

The impedance of the CS5 at 20Hz is 2 ohms and not .5 ohms as stated. At 10Hz it is approximately .6 ohms.

At 10Hz it is approximately .6 ohms.

That when the vinyl warp frequency will tax an amp, or even a bit of dc servo flutter when the mains chucks a slight wobbly.

It's been reported that Jim Thiel ended up using Krell 600 Watt'ers.

Correct type of amp, that will almost double down to 2ohms without breaking a sweat, though the 250 or even 150 watt'ers would do, they all can do the Krell doubling act.
There are many other brands that do the Krell doubling act also, all use Bi-Polar (bjt) output transistors, just like the Krells.    

Cheers George

georgehifi5,679 posts08-27-2019 10:43pm

 And you maybe happy with that, because you don't know better.

Cheers George

   This is an unfortunate reality from those of us attempting to make a helpful suggestion with very little actual in home comparative experience. 

   After owning four makes and in home auditions of three other switching amplifiers I've been using a pair of Hypex nCore 400s to drive my studios monitors that dip down to 3.6 ohms, an Acoustic Image Focus 2R driving a menu of Bass cabinets, and various Velodyne subwoofers. My only suggestion is to listen for yourself.

   I'm a class D fan but I'm not fooling myself either. Their plate glass transparency along with switching amplifiers general lack of congestion make them a tool in my studio. In the living room they're simply no match for the relaxed musicality of my tube amps. All the best with that Ralph, you've got the ears for it. 

m-db:
"I’m a class D fan but I’m not fooling myself either. Their plate glass transparency along with switching amplifiers general lack of congestion make them a tool in my studio. In the living room they’re simply no match for the relaxed musicality of my tube amps. All the best with that Ralph, you’ve got the ears for it. "

Hello m-db,

     ’Plate glass transparency and a general lack of congestion’ is a very good description of good class D sound characteristics. I’m a big class D fan, too, using a pair of D-Sonic M3-600-M monos for my main speakers for music and two additional stereo class D amps for HT, one in bridged mono for the center and one in stereo for the rear surrounds. They all function and sound great and they draw so little juice at idle, I’ve just left them on virtually 24/7 for the past 5 years.
     I usually describe their sound as very detailed, accurate, dynamic, smooth without ever sounding harsh or bright and so neutral they’re like ’the audio ideal of a straight wire with gain’. But ’plate glass transparency’ is very descriptive and really paints an accurate picture. I hope you don’t mind if I steal that phrase.
      I'm also really looking forward to auditioning the class D amp or amps Ralph is creating.  He definitely does have the ears for what good amps should sound like.  Hopefully, he's able to make them reasonably priced since I get the feeling I'm going to be a future customer.

     We all know George will be first in line.

Thanks,
Tim