well sounds like you really wanna cook the coils on the idmax's huh?
because you know they only need maybe 500~700w RMS to reach their linear excursion, but you knew that. and you also knew that bass boost will just add to the bonfire because once clipping sets in with your amplifier that you obviously set the gains correctly for, the bass boost is just going to help heat up the coils and feed a dirty signal to the idmax's.
not that distortion ever killed a speaker, but the blatent overpowering of the idmax, and the bass boost to boot, i dont see them lasting very long in your install. just my 2 cents.
a pair of idmax's dont need 1800w. 1200 for the pair is more than enough if you installed them in the correct enclosure, but then again - headroom is never bad, but it sounds like you are not using the amp for headroom lol.