Well, if they'll reportably run the later Scintillas w/no prob, than basically any speaker. There might very well be tougher amp loads than the late "1-ohm" only Scintillas, but would have to be rare as hens teeth. One of the most infamous "amp killers", even some Krells died on those speaks and those are the most recommended amps for Scinnies.

That said, it doesn't always mean the speaker owner will like or prefer the sound, tubes, Class A, etc.
