thanks for the responses
i'm looking for the diameter of the hole that the speaker mounts in. depth is really not a major concern.
i'm really hoping to upgrade the doors to 8" woofers if everything will allow for it.
the reason i'm asking is mostly because it's below freezing outside, and i can't just open up the car like i normally would before ordering stuff. at least without frostbite risk..
and fyi-- i've spent a whole lot more then $200 on a sub/amp combo! most people haven't heard of the speakers i run
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80prs deck, pdx v9 amp, peerless xxls aluminum cone 10" sub, peerless hds nomex 6" woofers, and dayton audio 3.5" fullrange mid/tweet.
and for the guys saying you can't get good bass out of the doors-- try sound dampening the doors. that's actually on my to-do list at the same time i replace the speakers, which already reach down to 50hz without complaint. they just lack 'impact' at that depth, which is the reason for the sub. i'm hoping between sound dampening, and the increase in cone size, i can get more impact out of the doors which would better shift the sounds stage towards the front, and rely less on the sub in the trunk.