I would be more concerned about ringing. The grill housing of the midrange tweeter system is all metal. This is going to want to vibrate big time.
The crossover is around 400Hz so the ribbons are going to have to work hard. Indeed your concern about maximum SPL is a valid one. Ribbons are not known for high SPL capability except when used in tweeters. The lower the operating range the greater the excursion required.
If you want a speaker that does everything well (rock and large orchestral) and covers the entire midrange with a single driver then look no further than ATC.
The crossover is around 400Hz so the ribbons are going to have to work hard. Indeed your concern about maximum SPL is a valid one. Ribbons are not known for high SPL capability except when used in tweeters. The lower the operating range the greater the excursion required.
If you want a speaker that does everything well (rock and large orchestral) and covers the entire midrange with a single driver then look no further than ATC.