Efficient speaker: Zu, Tekton, Volti, Klipsch, Fleetwood?

  I've run Tekton with tubes and First Watt (J2), they are efficient and sound very good, not very attractive (subjective). I was overall very pleased with Enzo. However, I have since moved on to open baffle. I prefer the sound of OB speakers and I am very happy with Spatial Audio (need few feet min. from wall though).

I have Avantgrade Duos and Trios, also an Acapella Poseidon, and drive them with a 6wpc, as flat of impedance as you can get.

I listen to the Uno and they are incredible, and as efficient as the big brothers.

when I listen to the Uno and compared with the Tannoy Kensington I own, it makes me regret that I did not buy a pair and and shipped them to my home in the USA.

now there is a dealer in the USA, they are worth a look.

I can't speak to the options in your list, except to say:

1. In a room that size, you're probably talking about Cornwalls rather than Fortes.
2. I have serious doubts about the WAF on anything I've seen from Tekton.  Whatever their auditory strengths may be, visually they really don't belong in any room above man cave level.  Maybe college apartment level.  (No offense meant, Tekton owners.  If you love 'em, you love 'em.  No justification needed.)

trentmemphis I agree that the Tektons are very plain looking. Cornwalls won't be necessary because we won't be listening at loud levels (mostly background levels), and the WAF isn't too great with those, either, due to the wide, squat appearance. But thanks for the input.

Zu Soul Supreme can fill your space, despite its size, but Soul 6 will do an even better job, yet it's even more compact. Soul 6, due to using the newer coax driver and the stiff & relatively lightweight cabinet better limiting energy dissipation in the structure, has explosive projection, more spread than Soul Supreme, and it goes deeper once you have the Griewe Gap correctly set for your room. You can get it in 12 colors. WAF tends to be very high.

Equally useful in your room, though with a larger visual presence, is the Omen Def Supreme. It has most of the non-subwoofer benefits of the Definition 4, at much less expense. The dual FRD arrangement further improves horizontal dispersion while limiting floor and ceiling effects. It's a great speaker for dual-purpose cinema / hifi systems.

This assumes you want to stay well under $10,000. Druid 6 equally applies, and in Zu's iconic form factor. Definition 6 is coming. But in the central range of affordability, the Souls and ODS will do a great job for your space and objectives. They are all amp-friendly and room-adaptive, having Griewe internals.

Phil