Best amp for kappa 8.1

I’m not saying Class D is not capable of sub 2 Ohm loads, but not many units out there with independent tests to support such load capability.

While still beyond that price range, I think one of the few contenders and perhaps the least expensive of them: some Krell’s. Try and find an appropriate one that has been properly recapped. If not, it might need it soon. Can be rather expensive, as can the shipping costs.