I’d like to have efficiency above 90db,
FWIW, The JBL 4435's have an efficiency of 2.7% and a sensitivity of 96 dB @1 watt @ 8 Ohm's. 😎
I own a pair of University "Dean" speakers from the 1960s. 103 Db @ 1-watt efficiency. Very rare speakers do your research. I think they sound better than K-Horns, with bigger bass and a larger presence. These very LARGE, HEAVY (The 15" bass woofer weighs 39 Lbs) speakers were designed for theatre use in a plain wrapper. Mine are the home version with mahogany cabinets shaped to fit into a corner. My Dad had one in the mono days and managed to find another many years later to end up with a matched set. The cross-over capacitors have been replaced. If you are interested in buying these, please PM me. We are downsizing and to a smaller place and they are too big.
great information everyone thanks you found a few i had forgotten about.
I've had many of the Klipsch line heresy's mk3's for a time them i tried the new Cornwalls but didn't really like them more then the LaScala's i alrteady owned other then the lower bass. just a note the LaScala's i owned were 1988 vintage with many mods, not one driver was original new crossovers, new wires by duland, extensive damping of horns and cabinet. they were really nice sounding regret selling still. but they were all black not my thing.