My recommendation would be to try a few different sounds: alnico like above; good soft-dome; parted-out AlMg anodized-gold Monitor Audio (I think other hard domes would be very difficult to integrate); possibly AMT.
Compression/horn not called for, given the MB was only 91dB sensitive and reached at least 6-7khz without issues. But whatever tweeter or super-tweeter has to be really good!
Thanks, could you recommend any specific models?
I've checked the Fostex horn tweeters but they are all higher sensitivity (96-106db) - I imagine they could work with an attenuator though correct? thanks!
Can you shop on eBay Europe (especially from de fr uk it)?
The two other speakers in the pics are Fostex F120A in planet10 designed Fonkensteen; Lowther PM2A ticonal in classic Fidelio. I've had these over a dozen years ('steen cabs finished not too long ago). The unmounted pair of drivers are Hicastle (Taiwan brand), virtual sonic clone of my PM6A drivers. All can be searched in the forum. I started diy only since Covid....
Yes I can shop anywhere so I would really appreciate if you can advice on a few models to look for.
Which of the 3 pairs of speakers do you like the most? I'm familiar with all 3 drivers.