I most recently hooked up my Compact 7ES-2's to a PS Audio HCA2, and I have heard them with a Plinius 102. I think the solid state amp really controls the bass on these speakers, and I don't feel a pressing need for a sub, although I don't think it would hurt. The vocals are still really beautiful with the HCA2, though a bit nicer with my Bruce Moore tube amp. The HCA2 sounds just slightly tipped up, and compared to the Bruce Moore maybe a little hollow in the lower-middle midrange - but still good enough to enjoy tremendously. The Bruce Moore is pretty good on the bass, but the SS amps are better.
