Yep, that sounds right. If you run them in bilateral configuration, you shouldn't even have to worry about the crossovers. Just solder the wire directly to the output of each channel (+/-) instead of using the screw or allen wrench... or whatever. It honestly helps with the quality and that way your wires will never come detached from the amp when going off-roading or drifting. Seriously.
After you solder them to the terminals, just run two sets of 14 gauge from the same output on the amp to two separate sets of comps. Make sure you solder these as well. Do that for each set and voila, you have 8 sets of comps running off a 4 channel amp with "7 gauge" wire. It's as easy as that.