Class D amps are generally not good current sources. They tend to have minimal headroom and weak power supplies. This is why a 200 watt/ch AB MOSFET amp will usually sound more powerful than a 400watt/ch class D amp.
Some will contend otherwise but that has been my experience. Certainly there are exceptions out there but probably not in any class D amp that's been around for more than a few years. That tech has only recently begun to sound decent.
I'd look at the power supply of the amp first and foremost. Investigate whether it has a large transformer and large filter caps? (look for something at least 20K microfarads/channel).
The Parasound Hint6 is a high-current amp and can drive almost anything. I'm told Naim amps are as well.
Some will contend otherwise but that has been my experience. Certainly there are exceptions out there but probably not in any class D amp that's been around for more than a few years. That tech has only recently begun to sound decent.
I'd look at the power supply of the amp first and foremost. Investigate whether it has a large transformer and large filter caps? (look for something at least 20K microfarads/channel).
The Parasound Hint6 is a high-current amp and can drive almost anything. I'm told Naim amps are as well.