3.3 maggies have no midrange,What Happened ?

The midrange fuse blows and after I change it the midrange still does not work.After it sets for a while in my case a few days they work for a few min. and start the procedure over.This all started after I added a crossover to biamp.At the same time I added a pair of equallizers.I have no electronics education so please I need help.After opening the 3.3's found only a coil and what looks like a cap. in the signal path.Could a cap. work part time and cause the fuse to blow?Could the addition of the eq's and crossover cause the value of the existing cap? to be incorrect now? Please any help or advice would be appreciated.Called Magnepan but as of yet cannot speak to anyone with any info or suggestions. (over a week ) audiobob