Dave,
I was knocking you on the battery. I used to run down a group 24 in about 20 minutes with a system with only one extra amp. (I might have to change batteries to compensate for the extra 10 lbs of magnets.)
If one could stand the MINI on end I would consider using two part foam. It is very hard to deliver without gravity. BE CAREFUL with this stuff it can push panels out.
Do you think foam is stiff enough. I would definely damp it and fill the cavity with hollow fill fluff too.
I think this 6x9 location has potential. I will run two pair of wires in case I bi-amp or change brands later.
I can see the road noise will be reduced by the proposed treatment. That's a big plus.
I'm off the project for a few days..standby..happy and merry.
