Im thinking about building a blow through box for my truck to run four 12s or four 15s.

Ive never done one before so im trying to find out some of the details to doing it before i jump in and do it.

1) I found most people use acordian seal from RV suppliers to seal up the hole inbetween the bed and cab. Is that the best thing to use ?

2) Water proofing the box how do you go about doing so ? I would perfer not to run a topper but i will if i have to.

3) i was thinking having 2 subs on each side facing in toward each other, were would the best spot for the ports be then ? In the front of each box into the cab with 2 smaller ports ? OR on the same side as the subs that creates a chamber to direct the sound to the cab through one big port ?


I will probably think of more to ask as this takes shape.

This is for my 97 sierra Single cab with an 8ft bed i would like to keep the box in front of the wheel wells so i can keep some space.