well i had planned on the AQ2200 but i need my power at 2ohms so im now looking at the ZX2500.1 It should put out around 2700ish watts which will be fine think with those woofers.
That is not how cone area works, I hope you were joking..? //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif
4 15" subs actually have around 706in^2, and 2 18" have 508in^2, and 2 21's have 692in^sq.
on the amps im using i set one to master and the other to slave and do all the settings on the master . rcas just go in to the master one not sure if all amps are the same.