Are future improvements in Amp/PreAmps slowing to a crawl?

I once had a Carver TFM-45 become unstable and dump DC to a brand new pair of Apogee Stages I had just bought. Big brilliant blue-white arcs shot from the ribbon tweeters two minutes after power up. A revolutionary product to be sure.

Dave

^^Yup.

Eric

I built the low TIM Leach amp from Audio magazine, and followed through with the next year of 100+ circuit changes in the following issues. I also owned Leach’s L S R&D amps from his company.

He did not believe in matching transistors, and his amps were "average" sounding for their time!

His article just re-hashed what was known in amplifier circuits at the time. No breakthroughs IMO.

TIM was just "frequency overload" in fancy talk.

I never said the amps were exceptional, but that the paper put together the formula.

I am unaware of any other document before his paper that put together all the components that would become known as the SS formula. If there are, please share.

High distortion SS amps were no longer passable as hi-fi.

I have no idea what "frequency overload" means. Explain?