Wow thats a heluva lotta tweets blown here..... I've suggested it before on other threads and I'll do the same here..... if you were to solder a dome light bulb in series on the positive lead to the tweeter you'll most likely save ur tweets from distruction.... Bose has been doing this for many years on their 801 and 901 series speakers and Polk Audio even uses this method to protect the tweets on their $800 SR6500 series components...... I put the bulbs on the tweets in my van after blowing a couple the first week they were installed and haven't had any trouble with them since.....
I've been asked before how they work..... dunno for sure, can't tell ya..... But they've saved mine now for over 2 years....... just my worthless .02 again......
The resistors are getting hot because there is more current going through them than they're designed for, I mean they're 5 watt resistors, ever touch a 5 watt night light bulb?? It's most likely caused by blowing the tweets/voice coils nearly being shorted.... I'd also imagine that clipping in the signal had alot to do with it as well..... another worthless .02.......
