I have been running 2 12" zcons for little over a year. 6 cubes 38hz 80cuin of port area. drivers side port all facing into cabin spray foam sealed  of family car. trunk build. still have to load kids in back seat. seats fold down.

 

Always been run at 1 ohm.

 

I was using a saz3500v1. when I built that box and tuned it.

 

I recently bought a B2 M1s to run on these subs. 7500w @ 1ohm.

 

with the power increase I was looking for any help with what the new box would require as far as net volume. Looking for help????? suggestions???

Try it with the same enclosure first. If it doesnt like it I would go down to 5cu net. Too bad tuning is already high or I would just say add large 45's inside to lower volume but it will raise tuning in return.

box has already been removed. plus one sub needs recone. that is why box was removed. thanks lee

Oh then I would do 5 net maybe 5.5 with around the same port area tuned 32-34hz. But there may be better opinions out there.

Oh then I would do 5 net maybe 5.5 with around the same port area tuned 32-34hz. But there may be better opinions out there.

 

Thanks lee I am looking for opinions/help. all advise will be thought through

Are you looking for numbers?  

 

Lee is right in shrinking the box volume with the big jump in power.

thanks aaron