Had a similar issue also, my problem ended up being a rail fuse in the amp. I scratched my head for days thinking a crossover in the speaker was going bad and only found it when the other rail fuse on that channel went. I have 2 fuses per channel on each rail.
It doesn't sound like you have the same problem. My point being, one has to get to know their system from trial and error and even then something always has you scratching your head again.
It doesn't sound like you have the same problem. My point being, one has to get to know their system from trial and error and even then something always has you scratching your head again.

