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12 inch Alpine type R box build. help!

Old 07-13-2011, 03:04 PM
0 Watt CAFz'r
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Join Date: Feb 2007
Posts: 41
12 inch Alpine type R box build. help!

Hey guys,

This is my first attempt at actually building a sub box. I recently acquired a 12 inch alpine type R and im looking to build a box that will yeild best results in a ported design. Ive done some reading thus far, but I would like suggestions on what would be the best box and port dimensions for this sub. Its going into the trunk of a 03 mitsubishi lancer, if that makes a difference. And i usually face the sub to towards the seat.

Should it be L-port? Or Slot port? What kinda MDF do I use..3/4 inch? What kind of screws and glue? Im fairly capable of building but im new to the whole tuning of the box. Right now I have a mtx tc6001 amp, that pushes 600watts rms at 2 ohms, which should be plenty for this sub as its rated for 300 :/.

So basically, I have about 15-16 inches high, about 40 inches wide, and length is whatever it needs to be to make the sub sound proper. Ive included the specs below. I listen to a lot of reggae, hiphop, and RnB and would like a mix of SQ and SPL. Not into competitions but I want it to sound loud as well.

If you guys could help me out as to a design that would work, and what frequency is best for the port to be tuned, please advise!! All of your help is greatly appreciated!


Description Kevlar reinforced pulp cone, Nomex spider
Range / type Subwoofer
Typical use Car
Recomended enclosure 19-27 L
Production status active 2003
Nom. diamerer [inch] 12
Vas [Liters] 58
Qts 0,43
Qes 0,45
Qms 8,31
Fs [Hz] 28
Sensitivity [dB] 87
Max Power [W] 300
Power definition RMS
Lower freq [Hz] 28
Upper freq [Hz] 1000
xmax [mm] 13,8
Disp area [m2] 0,0467
xdamage [mm] 27,5
Air gap [mm] 10
Coil height [mm] 37,7
Coil diameter [mm] 50
Re [ohm] 3,6
Z [ohm] Dual 4 ohm
L [mH] 3,85
Driver volume [Liters] 3,4

Last edited by D4nnyD; 07-14-2011 at 08:01 AM.
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Old 07-14-2011, 08:02 AM
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Join Date: Feb 2007
Posts: 41
bump? any ideas? i wanna get this done soon. thanx!
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