haven't post much but need help

building a sub box and am going to bolt it to the metal behind the back seat

is there any other thing i should be doing?

any help would be appreciated

system is 2 -12 audiopipe txx12ap subs ( been using them for over 3 years)

2 - IA 20.1 ( these subs have never seen both amps ) (these amps are amazing )

2 extra batteries just for the amps

Moved to general audio.

Is there anything else you should be doing to achieve what goal?

want to hit 150

was at 140 with 1 - kac 9152 ( about 900 watts) with old boxes (tuned at 32 hz)

with the 2 -IA20.1 uping the power to 3600 so if you add 3db everytime you double your power then i should hit 146

car freq is 50 hz so i am trying to tune slot port to 50 hz box will be 3 cu ft

Make some wooden pieces to go between the enclosure and the vehicle side and top walls even with the front baffle. That will seal the subs (I assume you're firing forward) from the rest of the trunk, which effectively lowers the amount of air that the subs have to pressurize in the vehicle. Then use some expanding foam or something to fill in the holes that the wood doesn't quite fill.

was going to put baffle board between backseat and trunk then bolt sub box to baffle board

then put mdf on rear deck and porting through there

and yes subs will be facing my seats

did put expanding foam in trunk lid and i will trying filling every hole

but what about any wiring going through ? or should i just put the expanding foam over the wiring?

here is some pics to give you an idea what i am doing

http://www.cardomain.com/ride/2208724/5

by the way thanks for the help