vented box for 4 css 15

[pxcr440]

how long should the vent be and what are the dimentions of the vent to tune it to 35 hz
the box per sub measures 18 long by 18 wide by 16 tall. at three qubic feet per sub i dont know weather to port the box or vent the box. Im going for spl.
4 concept css 15
2 concept 800
0 gage wire
optima yellow top
please help

[ngsm13]

Originally posted by pxcr440
at three qubic feet per sub i dont know weather to port the box or vent the box.

optima yellow top

please help

ported and vented boxes are the same thing. The types of ports are different though, circular ports...square ports....slot ports. As for that, u need someone with winisd! I don't have it, b/c i'm at school...o sorry can't help ya here. AND, as for the optima yellow top, are u just adding that extra battery? Are you doing anything to your alternator...or keeping stock alternator? If so, don't ge the extra battery. peace

NG