Celestion Cabinet 2x18’’ CF1840JD

Hi Marc and sound fellows!

Marc, thank you for sharing your plans and knowledge, really appreciated!
I'm interested in two subwoofers design that you provided: Celestion Cabinet Design Competition 2014 2x18’’ CF1840JD and MPP-246.
I'm looking for home 35-120hz solution and both of them looks very efficient but were designed for different drivers.
I'm wondering what should I changed to make them work for driver with this T/S:
Fs: 29Hz
Qms: 5.9
Vas: 390 L
Cms: .19 mm/N
Mms: 165 g
Rms: 5.03 kg/S
Xmax: 14 mm(peak)
Xmech: 25 mm(peak)
Sd: 1218 sqcm
Vd: 3.42L (p-p)
Qes: .23
Re: 5.6 ohm
Le: .41 mH
Z: 8 ohm
Bl: 27.06 T/m
Pe: 1000W (cont.)
Qts: .22
1WSPL: 98.15 dB
2.83V: 99.7 dB
Thank you

Hi, if you're looking for 35Hz -3dB, this driver will work in the MPP-246 without modifications. The driver has a low Qts but compensate by a big Vas.

Thank you, Marc!
What LPF you can recommend for MPP-246?

What LPF you can recommend for MPP-246?

80 to 90Hz.

I see.
It's a bit low for my target.
Any chance that driver will work in your Celestion Cabinet Design in 35-120hz range?

The problem if you xover at 120Hz: when you put gain on the sub way, the low mid will be boosted and sound very boomy. So if you really want a 120Hz xover, you can use the MPP-246, but don't use gain on the sub way: make the fréquency response totally flat, then you must use use a Low Shelf Eq, and this Eq must be in the input section of the DSP (not in the sub way out). Adjust gain and frequency until it sounds good. If you use an other method, you will have boomy sound and it will be more difficult to fix.

That's explained a lot.
So if I limit the LPF at 90hz I can use that AE driver even with Celestion Cabinet 2x18"?
I really like that design)))