The most efficient loudspeaker I know of is the Klipschorn corner horn. It's the only loudspeaker that will truly play at level for an SET amp. You can find them used for $6000 and less. New they retail for about $15,000. Cosmetics have a big effect on the sale price. If you're OK with something that hasn't been treated well, you can find them at a substantial discount.
You'll need a room with opposing corners because they only work properly when pushed into a corner. They use the walls as part of the bass horn.
If you're so dead set on running an SET amp, then the only real answer is the K-horn. I think it's the tail wagging the dog, but if you have to run an SET amp, then this is where it leads.
You'll need a room with opposing corners because they only work properly when pushed into a corner. They use the walls as part of the bass horn.
If you're so dead set on running an SET amp, then the only real answer is the K-horn. I think it's the tail wagging the dog, but if you have to run an SET amp, then this is where it leads.