Box help for a CDT QES-1220 12" sub

[Nibrok]

Hi guys,

I just purchased a CDT QES-1220 12" and looking for a sealed box. Here are the specs taken from CDT's site.

Thiele-Small Parameters

Free Air Resonance: 35.2 Hz

Voice Coil DC Resistance: 3.68 Ohms

Voice Coil Inductance @ 1 kHz: 3.54 mH

Mechanical Q (Qms): 6.06

Electrical Q (Qes): 0.56

Total Q (Qts): 0.513

Compliance Volume (Vas): 30.36 l; 1.07 ft3

Moving mass, Diaphragm: 206 Gr

Motor Force Factor: 17.54 Tm

Mounting depth

6.22” (158mm)

Outer diameter

12.28” (312mm)

Cutout diameter

11.0” (280mm)

 

Sealed Box Responses from top to bottom at 10Hz:

Top: Response corrected for typical cabin (medium sedan)

Bottom: Response in same volume taken without correction (2PI)

Response selected for medium sedan

Box volume = 0.50 cubic feet - add 0.12 cubic foot for driver inside

(Total Vol.=0.62)

​

There's a local shop that has pretty good sealed 12" boxes for $100 that are .75 in volume and wondering if this would suffice.

Thanks in advance!!!

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[mylows10 5,000+ posts]

yes

 

[Nibrok]

Searching around on the net I found this, just wondering on peoples thoughts...

 

[nvturbo 10+ year member]

That box from sonic will do. $40 shipped is a great deal, if you're not wanting a custom fit box.

 

[trumpet 5,000+ posts]

The box from Sonic will work, but I would give that beautiful sub a higher quality enclosure. I understand the value and convenience of ordering a prefab. Make sure you pre-drill the holes and listen for any air leaks. Even the smallest air leak will alter the performance.

 

[Nibrok]

Thanks Barry, I figured prefab would be a no no. The one thing I like about it is the design, the angled back is exactly what I want for my hatchback. Can someone here make me a high quality one?

 

[nvturbo 10+ year member]

You can make one yourself to perfectly fit your car. I would use the formulas from the12volt.com. Just remember to account for the subwoofer displacement value when calculating the box size.

 

[SUNDOWNBITCH]

Do you already have the design?

 

[trumpet 5,000+ posts]

Thanks Barry, I figured prefab would be a no no. The one thing I like about it is the design, the angled back is exactly what I want for my hatchback. Can someone here make me a high quality one?

I ordered a QES-1220 today for myself as well. Right now I'm planning to get a box from High Output Enclosures made from birch. You might want to ask for the flush mount option. It looks so much nicer.

 

[Nibrok]

I ordered a QES-1220 today for myself as well. Right now I'm planning to get a box from High Output Enclosures made from birch. You might want to ask for the flush mount option. It looks so much nicer.

Thanks for the info. I just had got done PM'ing DC Creations on a quote. I'm curious to see what you end up doing...