please check my winisd numbers

[pne123]

I just bought a mcm 250w amp, now I have to select a driver.
The sub will be used 90% ht in a 14x24 room and would like the box to under 24" cubed. Side question, is a rectangle better than a cube?

I ran adire dpl-12 vented in winisd pro and got some really good numbers, i think. I am a newbie.
I am hoping someone could verify them for me.
It came back w/ a 139l box tuned to 16.6 hz w/ a 4" vent 22.06" long. It would have to be rect. because 139l equal 20.4 cube.

Is that right and is that good or really good?

Re 3.36 ohms (6.72 Ohms per voice coil)
Le 2.38 mH (4.76 mH per voice coil)
Qms 11.16
Qes 0.41
Qts 0.40
Fs 16.3 Hz
Sd 506 cm^2
Vas 149 liters
BL 13.88 N/A
Xmax 14.3 mm one way
SPL 84 dB @ 1W/1m (87 dB @2.83 Vrms, 1m)
Pmax 650W (per IEC 268-5)
Distortion <3%, 16 Hz - 200 Hz, @ 103

I have 150 shipped to spend on a driver, is there better for the money?
I know the tempest is also 150 shipped but I do not need that big. The titanic II is on back order at pe and to expensive at acustic visions. The av12 is to much. Dayton DVC is 120.
i guess I could still order the Titanic II and build the box until it gets here.

thank you for any input

[SY]

My copy of CALSOD is not at hand at the moment, but nothing looks severely amiss except I'd worry a bit about that port length.

[pne123]

thanks.

The port length is what I was worring me and that the 16.6 hz seemed really low.
I have searched alot of forums and could not find anybody getting the same range of results that I got.

If I am the odd man out, I have something wrong.

[GM]

The vent is a bit too long for Fb = Fs. This is typical of the free/shareware programs I've used. For an acoustic ratio cab of 30.5" x 21.43" x 13.22" i.d. I get a 4" dia. x 18" long vent, and for the theoretical max vent mach, 6" dia. x 42" long. At this length though, the XO needs to be 80hz max, with a 4th order slope.

If I were to build one with this driver and a tube vent, it would be a folded pipe 81.56" long x 13.09 " x 8.09" with the driver down 26.93" from the 'top' and a folded up 6" equivalent dia. vent 35" long.

If it's a bit 'boomy' from too much room or boundary gain, then you can either room tune it by damping the port or use digital EQ.

GM