My teenage son had great parties, over the years he and his friends blew 4 pairs of tweeters on my JSE Infinite Slope Model II’s. They would have the wrong input, push the volume to max, then find the correct input, blam. Cost him $60. each party.
I was replacing the Dynaudios, finally used a Focal, sounded great and it’s ferro fluid could take a hit better than the Dynaudio.
https://www.madisoundspeakerstore.com/speaker-drivers/?gclid=CjwKCAiA57D_BRAZEiwAZcfCxYIT_--EutU3614... Because both are blown, I believe something like that blew your pair of tweeters (before you bought them perhaps).
You need to get to the back of your tweeters.
To prove internals are ok, there is a signal to the tweeter, is to buy a cheap tweeter, any driver, and touch it to the speaker’s tweeter’s wires.
Works, your tweeters are burnt.
No sound, other drivers work, something internal, part of the crossover? Unusual that crossover in both speakers would develop problems, unless the same weak point failed: one, then the other, finally noticeable.
To skip the crossover: disconnect the speaker wires. pull the tweeters, lower the volume to zero, touch the speaker wires to the tweeter, raise the volume a bit, just enough to see if the tweeter’s coil is good. If the tweeter moves, it’s something else, crossover or internal connection.