ok so ive come up with this. Need feed back

[Joe X]

Looks on spec for up to about rated power. Fixed port though.

Edited May 17, 2012 by Joe X

[john253a]

[jeffrm]

ok these are the specs for my subs, my max width is 58, max depth is 25, and max height is 18, can someone do something with these, please

QT15D- ported- 2.0ft3 4” port x 13 ½” long (36Hz) F3=50Hz 700w

2.5ft3 4” port x 9” long (36Hz) F3=46Hz 700w

3.0ft3 2(4” ports x 17 ¾” long) (36Hz) F3=43Hz 1000w

3.5ft3 2(4” ports x 16 ¼” long) (34Hz) F3=40Hz 1000w

4.5ft3 2(4” ports x 10 ¾” long) (34Hz) F3=37Hz 1000w

4.5ft3 4(4” ports x 6 ½” long) (55Hz) F3=45Hz 1000w (SPL)

Edited May 18, 2012 by jeffrm

[Joe X]

i think this would murder lows

You came up with the above and it adheres to this spec:

4.5ft3 2(4” ports x 10 ¾” long) (34Hz) F3=37Hz 1000w

The 4.5 cubes are before displacements, if you subtract the the driver and the two aero ports displacement you end up with around 4 cubes net. So 8 cubes net for two drivers.

[jeffrm]

Ok ill try the one I did and see what happens.

[Joe X]

The alternative is building a box with removable side aero port (2 8" pipes likely), that would let you change the tuning to compete. You would need to research how well a side port will perform in your particular vehicle.