MC352 into varying-load speaker?

Sean, thank you for the excellent analysis and background info. I will try to talk with someone at Usher Monday. I do not have the Mac but am contemplating purchasing it used, but at its weight and cost it is something I would like some more knowledge on before committing to.
Did you imply that even with a rating of 4 ohm the Ushers just may sound better on the 8 ohm or 2 ohm taps and the only way to know is to try it?
Also, without getting too much into the search function again (I am really tired of doing that) do I recall correctly that at times you might have been a little critical of the Mac design philosophy? Forgive me if mistaken, but if not I would like to understand why, with a view to gaining knowledge prior to purchase.

I drove Infinity kappa 7's with my 352 for years. The Kappas are all over the impedance road. I have heard from 2-32 ohms. At least that is various dealers told me. But the 352 came through flawlessly. The autoformers seem to adapt with no problem.

Kck: I am not a fan of "autoformers" in the least. To me, they are blasphemous. If you really want to know my thoughts on them, fire away with questions. Just don't expect "politically correct" answers. Sean
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Sean, confused. Your first post in this thread seemed to imply that autoformers could work. But the blasphemy comment is pretty strong in the opposite direction.

Not knowing where to begin picking your brain, perhaps you could summarize the idea, if it's not asking too much. Essentially, the question would be: "Do autoformers hurt, help or are neutral to sonic quality under most/average circumstances, and in what circumstances do they veer from this stated path"?

Kck: Autoformers act as a buffer. If you have an anemic amp and a speaker system that presents a wild and highly reactive impedance as a load, that "buffer" could be a good thing. Otherwise, that "buffer" acts as a sonic veil between the amp and speaker interface, lowering the sound quality. Using an autoformer with a good amplifier would be equivalent to running hundreds of feet of small gauge highly inductive speaker cable. Would you ever consider doing this under normal circumstances??? Sean
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