Barque & Consonance's Opera Consonance M15 mates a 15" woofer with a unique multicell horn tweeter. Sensitivity is 98dB (!) and frequency range is rate at 30Hz–20kHz. The tweeter handles everything above 500Hz. Price would be around $10,000/pair USD, not including distribution costs.
They were stunningly dynamic and not shouty at all—at least on the acoustic vocal music I was listening to. I walked back in a few minutes later and they were pumping out amplified music, which was not to my taste at all.
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