Beryllium Tweeters

92db is not high efficiency

The baffles are all overly small and require BSC to compensate but sometimes the BSC is omitted and manufacturers rely on owners care with placement close to room boundary. Toss in many require powerful amplification and its subsequent thermal compression leads to a hard sound. Its not the BE its the total design its used in that causes issues. If baffles slim or its a monitor its going to have issues.Today quality of sound in most loudspeakers are compromised by market expectations that small is good. And how many fit on standard shipping pallets is more of a design concern than sound quality.

Acurus “Hofman’s Iron Law” and it offers you any two of the following: small cabinet size, deep bass and high sensitivity. No Omegas exist as you discribe and your idea that it depends how you define it is very wrong. Also would seem you feel that only adnormal people understand loudspeakers and with that I slightly agree.Normal people don't need science or physics interfering with what they feel is right.