I tried a bunch of tube and solid-state amps with the Sophias I owned, and I agree, they are a relatively easy load, an easier load than the Watt Puppy 7's I later owned. Tube amps do seem to give the speakers some dimensionality and weight that SS amps just didn't do. If you want the ultimate in bass, a Wilson strong suit, SS amps are the ticket, but I thought some of the more neutral high-powered tube amps from Conrad-Johnson and Audio Research gave a bigger soundstage and instruments with more heft, while only reducing the ultimate bass definition and extension to a small degree. I tried BAT and Jeff Rowland SS amps and I could never get used to the flat soundstage, but finally settled on some Essence amps that were far superior in speed, dynamics, bass, and detail to anything I heard before, while having some of the dimensionality of tubes.
