Al, the amp will be fine on that speaker if it employs negative feedback of sufficient amount. At that point it will behave as a voltage source as far as the 28 ohm peak is concerned.
90db 4 ohm with tubes?
Hi - I'm thinking of upgrading my speakers. On my list of things to check out is the Usher Mini Two Dancer, which is rated at 90db @ 4ohm. My amplifier is a Cary V12R running at 100W in ultra-linear. In theory at least, would this combination work? I've always had the notion that tubes would work best with an 8ohm load, but I though it was worth asking about.