Yes... Harbeths are special when driven by the H590, or the H390, H360, H300. They need the power these amps produce to control their drivers, and add clarity and resolution to the sound. Their high damping factor really clears up the bass and mids.
I would not have kept my M30.1's and M40.2's had I not found the H590, which totally changed their sound from muffled and too warm... to... very balanced sound with amazing clarity and detail resolution, as well as superb bass and soundstage.
I doubt any tube amp can drive them as well. I've tried the ARC 150SE, and it does not. I doubt any others can either.
I would not have kept my M30.1's and M40.2's had I not found the H590, which totally changed their sound from muffled and too warm... to... very balanced sound with amazing clarity and detail resolution, as well as superb bass and soundstage.
I doubt any tube amp can drive them as well. I've tried the ARC 150SE, and it does not. I doubt any others can either.