I have used them with Revel M106, plenty of power...PSB M2, a 4 Ohm speaker...drove them no sweat. Current and favorite pairing? Mid Monos with my Heresy III. Great combo, but the latter mentioned combos sounded excellent too.
I am using KT 77 and they work well in the Mid Mono
I am using KT 77 and they work well in the Mid Mono