Need A little help with a 2cube 31/32 ported for a TypeX12

[Hockyeyd214 10+ year member]

Hey,

Well after having my Alpine Type X 12 in its 1.3 sealed fiberglass console, I want to get it a tad louder so I am going to try a ported box at either 31 or 32.

Here are the max external dimensions that I can work with. (using 3/4" MDF)

34" width

13.75" height

11.5" depth

thats about 2.3 cubes before displacement, which is about .24ft cubed.

This is going to go in my regular cab in between my captains chairs. I have tried all of the box calculators but just can't seem to get one right with a port because the calculators always seem to want to change a dimension, and I just cant do that. I have built a ton of sealed boxes but only one ported one, which was from the sticky thread of box plans on this site.

Here are the specs for my Alpine Type X 12

• Coil Height (Hvc) : 48.1mm

• Cone Area (Sd) : 529sq. cm

• D.C.Coil Resistance (Re) : 3.6ohm + 3.6ohm

• Electrical Q (Qes) : 0.69

• Equivalent Suspension Stiffness (Vas) : 32 liters(1.1cu.ft.)

• Free Air Resonance (Fs) : 28Hz

• Frequency Response : 23Hz - 200Hz

• Gap Height (Hag) : 10mm

• Impedance (Nominal) : 4ohm + 4ohm

• Linear Excursion (X linear) : 19.1mm

• Maximum Excursion (X peak) : 22mm

• Mechanical Excursion (Peak-to-Peak) : 75mm

• Mechanical Q (Qms) : 8.67

• Sensitivity : 83 dB/W/M

• Total Loudspeaker Q (Qts) : 0.64

Any guys out there want to give me a little help?

-Devin

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[bimma85 5,000+ posts]

I'd go 1.8-2.2 cubes tuned somewhere between 30 and 32. Also you're gonna need more room for 2 cubes net //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[rpfuror 10+ year member]

If you go with a round port (with thin walls) you can save space.