I need that space when I have the bike in the car....and it wouldn't be stealth.
I'm going to be a stubborn bastard and not give up until I find a design that meets all of my above criteria AND doesn't compromise sound quality/response.
in the mazda 6 they have a bosesound system and have the sub that sits in the spare wheel. its just a back box and you cant actually see the speaker. i dont know it one could be adapted to work with a aftermarket amp system tho
I saw something very similar to what you are after on trademe last week. It was a false MDF floor, with a sub screwed to the underside, and several 2" holes cut in it to let sound out, and carpeted over in the same colour as the rest.