port area

[brewer_brewer]

it can also effect them with to much port.

to much port will make the woofers almost act free air

its like an exhaust system on your car. to little will restrict and choke the motor

to big will eliminate all back pressure (not a good thing)

[jack]

i have 30 inches of port per cube lol... it works fine in my application

121 inches of port.. four cubes

that is alot much to much for daily use. with les port you have more "control of the subs" which will improve the longevity. 12-16 per cube sounds about right, a few slot boxes i had were built a little more towards the spl side of life but daily and they were 17 cubes with 200 inches of port. my bow for 6 fifteens has less than that. 30 per cube sounds more like a "burp box" ratio to me.

[Torres]

Any square/rectagular port is considered a slot port.

not necessarily. it's only considered a slot port if it shares at least 1 box wall as part of the port wall to effectively add in 'end correction' of the port. if a port has 4 of its own walls, like steves, then it's technically not a slot port.

[brewer_brewer]

not necessarily. it's only considered a slot port if it shares at least 1 box wall as part of the port wall to effectively add in 'end correction' of the port. if a port has 4 of its own walls, like steves, then it's technically not a slot port.

true.

its just a square port

[2003f150]

true.

its just a square port

I do 18-20 sq per cube daily or spl but thats just me and if the sub has a good suspension it will handle the big port :hairtrick:

[wL<3bass]

On higher Fs, more SPL oriented subs I like to stay between 16-20sqin per cube and for more daily driver SQL I usually stick to 12-16sqin.