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12 inch Alpine type R box build. help!

Old 07-13-2011, 03:04 PM
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Join Date: Feb 2007
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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!

SWR-1241D

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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bump? any ideas? i wanna get this done soon. thanx!
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