Porting Box Through Arm Rest Hole

[STEvil]

how does he have them in there right now?

If they're facing forward then turn them around so they face backwards.

[blownengine]

In 4th order the tuning of the box is not isn't really chosen by the builder it's mostly chosen mathematically. Determine what frequency you want to be your "roll-off" where the subs will stop responding well.

Use this calculator and enter driver parameters:

http://www.colomar.com/Shavano/4thorder_info.html

I have messed around with the numbers and it always gives me sealed and ported box sizes that are very close to each other in size. What happened to the 2:1 or 3:1 ratio?

Any help here?

Its (2) 12in Kicker Comps

Qts: .427

Fs: 26.5

Vas: 127.65

[dwright27]

I'd do 1 - 1.25 sealed per, and 2 - 3 cubes ported. If you want it to Play low, tune around 44 - 45 hz. With 13 - 14 square inches of port per cube.

[dwright27]

The smaller 2:1 ratio wont be as peaky as the bigger ratios and the 2:1 ratio will load pretty hard coming into the car from the c-pillar

[blownengine]

I'd do 1 - 1.25 sealed per, and 2 - 3 cubes ported. If you want it to Play low, tune around 44 - 45 hz. With 13 - 14 square inches of port per cube.

Ok thats close to my original plans.

I'm confusing myself now. Do the two subs share the 1.25 cubic feet sealed and share the 3 cubic feet ported? Or do they share the ported and each get their own induvidual 1.25 sealed?

Did that make sense?

[dwright27]

I'd probably do closer to 1 cube sealed EACH.

I said, 1 - 1.25 sealed PER ( which is each ) so that's a total of 2 - 2.5 cubes sealed for the pair, and 4 - 6 cubes ported total.

[blownengine]

I'd probably do closer to 1 cube sealed EACH.

I said, 1 - 1.25 sealed PER ( which is each ) so that's a total of 2 - 2.5 cubes sealed for the pair, and 4 - 6 cubes ported total.

Oops sorry. My reading skills dun failed me

Thanks alot I'll start drawing up some plans