You don't have to convince me, my speakers are 97 dB 8 ohm:)
I wouldn't own an inefficient speaker because I would be doomed to SS amps, and I hate the sound of solid state devices.
It seems that the latest generation class D/GAN may be addressing this. Time will tell.
@donsachs There are now class D amplifiers that have a distortion spectra that if you had one on the bench you would be completely convinced you were measuring a really well-behaved triode tube amplifier.
There are three reasons for this:
1) its really easy to get really high Gain Bandwidth Product values, such as 20MHz with class D, so feedback can be supported across the entire audio band (no rising distortion with frequency- like a zero feedback amplifier in this regard)
2) the feedback node can be very linear so the feedback signal does not get distorted prior to doing its job.
3) the things that cause non-linearities in the circuit tend to generate lower ordered harmonics.
Despite inexpensive power being available, I still prefer higher efficiency loudspeakers for the reasons Lynn outlined above. In addition, the harder you make any amplifier work the higher the distortion. For this reason I feel that higher efficiency and higher load impedance is an advantage to all audiophiles.
"There are now class D amplifiers that have a distortion spectra that if you had one on the bench you would be completely convinced you were measuring a really well-behaved triode tube amplifier."
Maybe. Except that there are things we cannot measure. I prefer the sound of a good tube to any SS device I have heard to date. Personal preference. I would not be at all surprised if that Class D amp measures better than my tube amp in every regard. I bet in a blindfold test I would choose to listen to the tube amp. Again, personal preference. Other people would make other choices, as it should be.
When do you think your new 300b mono-blocks will be available for order? I would want to buy them independently of a package with the Spatial Audio speakers as I have a pair of Daedalus Apollos (sensitivity about 96db) that I am super pleased with. I want to upgrade an integrated tube amp and have been patiently looking for the right 300b amp to drive them.