Speaker Technology over the last 10 years

I think that some designers have maximized typically thirty to fifty year old driver designs, such as the Sander Sound electrostats, but really we have only slightly better speakers now than we have had no improvements. There is one exception. I have heard several speaker using expensive air craft aluminum cabinets that have been extraordinary. I have not been able to afford any yet and one I wanted never went into production, this was the LSA Model 10.

By contrast I think electronics have greatly improved and my speakers have revealed this improvement, meaning that the speakers were better than the driving electronics.

Rebbi, at the Rocky Mountain Audio Fest, Stereophile had a amp seminar which consisted of showing how sensitive to the load an unnamed amp was relative to the Boulder amp. The measure was THD. Everyone was asking technical questions as to how Boulder had done this. I asked whether the designer of the unnamed amp thought THD was all that went into an amp. Everyone was aghast that I would ask this. I followup by saying why are we not listening to these amps? I left the room.