? on box construction

[Abahnic 10+ year member]

Ok, I built this box for 2 alumQ 12s in a seald box and put it behind my front 2 seats, mainly because i have 15 in the back. ? when i open my back glass the 2 12s get really loud more than when the back glass is closed. Is it possable to get the subs to sound that loud without the glass opened, I'm thinking if I port the box it will sound that way but not sure...Please help me, Thanks

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[Moe Lester 10+ year member]

you are probably getting cancellation issues somehow, its not a good idea usually to run different size subs...

 

[nosaj070 10+ year member]

What kidn of car is it? SUV? its because most of the volume from the 15 is going outside the car, and all you are hearing is hte 12's, they are cancelling each other out.

 

[Abahnic 10+ year member]

It's an suv but i unhooked the 15 and listen to the 12s alone and i get the same difference when i open the the back glass. The same thing happens when i run the 15 by its self. Should i move the 12s to the back or turn the 12s around so they face the front or what.

 

[Abahnic 10+ year member]

Anybody?