@ladok How true, impedance curve so important! Many speaker manufacturers don't provide this, I'd say this is more important than sensitivity rating. Extremely important in choosing amp tube type, output transformer and speaker tap.
Efficient speaker: Zu, Tekton, Volti, Klipsch, Fleetwood?
We’re moving and I’m looking for a high-efficiency, high impedance speaker that can fill a very large “great room” with smooth, open, detailed sound, both for serious listening and casual background music. I currently have Devore Super 9s, but those will be going in a separate dedicated listening room. I thought about getting another pair of Devores (maybe the O/93) for the great room because I love this brand, but I’m interested in other possibilities The new speakers will be on either side of a 6-foot TV console, so they’ll need to sound good fairly close to the wall behind them. And they will need to have a reasonably good WAF. They will be played mainly at low-moderate sound levels and our tastes include rock, classical, world music and “spa” type relaxation stuff.
Anyone who is familiar with any of the following candidates, please feel free to sound off. As you can see, price ranges are all over the place:
Zu Soul Supreme
Tekton Lore
Volti Razz
Klipsch Forte IV
Fleetwood Deville
Others?