View Full Version : Need recommendations on enclosure for CDT Sub

06-13-2013, 10:49 AM
So I picked up a CDT SQ-1200 for a decent price for my next build. It is a 12 inch cast with an rms of 600, which is right about what I will be putting to it. CDT recommends a very small sealed enclosure, no more than .75. I am no WinISP pro but when I modeled this I could not get a decently flat curve in a sealed enclosure and had almost nothing at the lower end(which I expected sealed)

When I modeled the sub in a ported enclosure, around 1.2 @ 30hz I got a much better looking curve and low end.

Can someone else model this is WinIsp or BB and see what you get? Thanks

Name: SQ-1200
Fs = 25 Hz
Qms = 7.2
Vas = 66 liters
Cms = 0.189 mm/N
Mms = 214 g
Rms = 4.678 kg/s
Xmax = 20 mm
Xmech = 30 mm
P-Dia = 251.3 mm
Sd = 495.9 sq.cm
P-Vd = 0.992 liters
Qes = 0.25
Re = 3.8 ohms
Le = 2.3 mH
Z = 4 ohms
BL = 22.6 Tm
Pe = 600 watts
Qts = 0.242
no = 0.398 %
1-W SPL = 88.14 dB
2.83-V SPL = 91.38 dB

06-13-2013, 12:53 PM
It really depends on the space you have available in your car/truck. Figure that out first and then work backwards.

06-13-2013, 01:16 PM
.75 cu ft gives you an Fc of 50.669hz, which sounds like a good starting point to me. IMO, winisd is useless.

06-13-2013, 02:35 PM
I have plenty of room since I will just have one sub.

06-13-2013, 03:26 PM
I have plenty of room since I will just have one sub.
Even if that's the case, you will still have to know what size box you need/want. We can recommend you countless box sizes but if they won't fit in your car/truck, it's pointless.

06-13-2013, 04:00 PM
As stated earlier, I have modeled .75sealed and 1.25 ported so I would like to stay in that area but can go larger if needed. My main concern is will the T/S parameters work well ported? I have the room and would like the extra output and low end extension if it works well. Winisd shows that it does but it is not a perfect program not am I a perfect user.

The ultimate goal is to getter the flattest response as possible, obvious since I chose this speaker, but output is always appreciated.

Thanks for the help so far.