Upon some request, here's what I plan to use to make my sub enclosure/amplifiers removable to gain access to the spare tire.
EDAC/Elco connectors. I only need 20 contacts but will go with the larger (38 point) one because I have them "in stock" The pins are purchased seperate and can be either crimp on (and a damn solid crimp) or solder type. I plan to run remote down this too.
For speaker I plan to use Neutrik NL8FC and NL8MPR's like on my PA cabs.
And for power I plan to use these disconnects.
There you have it, all taken care of in case of emergency or for those with high performance cars that want to shave weight at the track.