15 inch band pass box design check out
 

hey guys i got a shocker extreme by atomic thunder aka mouse with atomic recone and was thinking of a aband pass with dual 4 inch x 16 ports witch atomic recommends not abnd pass but for a 15 inch woffer with 1000 rms here is an example of the box should i go non band pass single port give me some ideas

a 4th order usually is a 3:1 ration sealed to ported.... eg. sealed partition in 1 cubic foot, meaning ported partition is 3 cubic feet

we really cant tell anything from your photo

thanks for the reply alright its back to the drawing board is 4th order band pass good idea or should i just go ported