Both tweeters are from axiom. Ian said they were interchangeable so I assume he has a pretty good idea.
Just swapped out the one capacitor from the bad cabinet. it was flaking out after about 2-3 minutes. currently about 20 minutes into a listening session and so far so good (knock on wood). I might replace the cap on the other side to match as the new one sounds a tad brighter.
Wish me luck that this one holds up longer than a year.
The Denon has two discrete 90 watt amps and I don't usually put it over 4 or things start to rattle off the shelves in the house and tweeters seem fine, just the x-over that gave out.