Is the most efficient speaker the best speaker?

"The answer has to be yes, if all other speakers were connected to a 5w tube amp."

No doubt high efficiency is the way to go with a 5 watt tube amp. No arguments there.

However, the most efficient high efficiency speaker still may not be the "best", so the premise as stated still does not work.

Never underestimate the evocative power of the facile.

Yes Timlub,

Sorry i had misread your response, all things being equal and exact it will have more dynamic range...
regards,

To the OP's question as stated: yes.

To my ears, only high-sensitivity systems really "breathe" and allow the use of low-powered, more refined amplification without compromise. Low-sensitivity speaks sound as if a wet blanket has been draped over them, comparatively speaking (ahem).

But, to each his own.

Triode needs to hear better non-flea tube amp powered systems.
They do exist!

I also like SET amps and high efficiency speakers as they can sound quite good also.