The sub is a Polk Momo MM2124. It's designed for car audio or marine audio like the Infinity. I tried modeling it in winisd but I don't have the knowledge. Can someone help out? I'm looking at doing a dual opposed sealed enclosure if it works well in that environment.
If there's a different type of enclosure that you think would work well, I'd be interested in seeing that too. Or, if this driver simply doesn't compare to the Infinity Reference, let me know.
Here are the thiele small params:
Nominal Impedance 4 Ohms
Frequency response 23 – 200 Hz
Fs (Hz) 31 Hz
Re 3.3 Ohms
Le 2.42 mH
Sd 80.4 sq. in.
Vas (cubic feet/pi cubes) 2.249 cu. ft.
Vas (liters) 63.71 liters
Power Handling (watts peak) 800 Watts
Sensitivity (SPL at 1 watt / 1 meter) 88 dB
Xmax (mechanical/mécanique) .75 in. 19mm
Xmax (linear/linéaire) .37 in. 9.5 mm
Voice Coil Diameter 2.0 in. 50.8 mm
It would in my opinion be very suitable, but you would have to make sure you have right type of amplifier power that beast. The cheap route would be to go and get a class d-amplifier (car audio) and a computer power supply to power it. Which isn't the best but will work for the lower cost, the other route is to get one of these http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-811
which would be plenty of power by over at least 500 watts. And to either make or buy a enclosure based upon your preference of sound. From what i have seen most home theater systems use a ported/vented design. I would rather have a sealed box. Here is another link
I'm not and audiophile so take my advice lightly.
Hope this helps.
here are the specs in winisd, so that you can play around too. enter the parameters that are in green and press tab and winisd will populate the rest that are in blue.
4.5 cubic footer tuned to 23hz (three x 3" diameter ports, 20" long, roughly), 200 watts, just a little past xmax. 300 watt amp should be ok. 500 watt amp would be redlining it as far as excursion.
a high pass filter around 20hz would be a good idea. if using a plate amp, they almost all have something like that baked in.