High efficiency tweeter

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My speaker has an 8" beyma mid and Vifa BC25SC06-04 1" horn loaded tweeter. The tweeter sounds good in general, but gets a bit sharp and sad when playing very loud.
This speaker had a peerless horn loaded 1" tweeter previously and it worked better. I think that had 98-99dB (8 ohm).
Are there any good hi-fi horn loaded tweeters with >95dB efficiency around?
I am not looking to go in to compression drivers and so on.
 
Selenium used to make a couple of slot loaded tweeters which were inexpensive, and very nice sounding with a ring-phenolic diaphragm - moreso to my hearing than things like Polydax and Audax titanium diaphragm bullet tweeters. I don't know why they were discontinued. The ST324 was only around $25 US

An externally hosted image should be here but it was not working when we last tested it.
 
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