Class D Amp For 'Stats?

I have a Bel Canto evo-4 and, it sounds outstanding on my Magnepan 3.6's. My favorite amplifier on these speakers. However, I do not like it on Sound Lab U2's as the sound character is thin and bright'ish. Switching amplifiers have an output filter and, this filter will interact to some degree with the load impedance. With Sound Labs, the reactive load impedance varies quite a lot especially in the lower registers. The BC just does not seem happy with the SLs. It's speculation, but I suspect it's not much different with any switching amplifier as they all have have an LC output filter.

The Atmasphere OTL amplifiers are my favorite on the big SL's - the MA-1s and MA-2s in particular. I have spent considerable time with both and, both work great. I have also tried the Wolcott 220s and, the Innersound ESL-300. There is a palpable richness with the Atmasphere's that manage to elude the other amps.

Here I go speculating again (it's a bad habit you know), but I blieve that if you have an Atmasphere or CAT, and any of the switching amps (as good as they are, and they are quite good) for 3 weeks of audition on your Sound Labs you will find yourself willing to put up with the heat, the warm up, the hassel, the expense, the pain, etc., due to the more immediate and palpable soundfield that will emanate from you panels. Call it body, richness, bloom or whatever but, the excitment and "you are there" experience is arresting.

Here is something to consider; most, if not all, switching amplifiers being mentioned in this thread are available from the vendor for audition with a full money back guarantee. It's a sign of confidence in their products and, a credit to the manufacturers offering this policy. You have one of the best speakers on the market. Go to the trouble of finding the one that makes hay in your system. You will ultimately be far happier. Every one wants to be on easy street and live the simple life but, the life of an audiophile was never meant to be easy.