I am looking for a high-sensitivity, i.e., preferably greater than 95dB, not horn loaded, not a ribbon, tweeter that is currently available in the U.S. The planned cross-over frequency is between 4500-5000 Hz.
Please consider this note a "Monty Phython" Now for something completely different.
When I studied controlled directivity and hearing_error_sensitivity my experiments with soft dome tweeters gave the best results when I researched dome tweeters like the SB29RCDN (*jay1111 *Linkwitz) with steep slopes ~1400Hz to medium diameter midbass speakers(phase plugs helps). The small size and low Fs of the SB29RCDN made it a "standout" in LOW Fs, Xmax, 94db/watt EFFICIENCY, minimal lobing, and SMOOTH with GOOD DETAIL.. not great detail. .. not magic.. just invisible. $60
thank you again very much for the additional suggestions.