Audio Guru's

[elite ATV1]

I bought an 18" MA Audio sobwoofer and i need to know the specs on the size box i need to know and how to calculate the cubic feet that the inside of the box needs to be.

Thanks in advance.

[ricksmx865]

http://reaudio.com/speaker_box/LPort_Box_Calc.html

this may help, its kind of backwards but you can input the lenghts you want in red at the top and it gives you your cubes at the bottom

works really well if you know the width and height of your box and wanna find out the correct depth.. for example.. hope that makes sense

edit: oh yea it gives you a cutsheet at the bottom too :devil:

[elite ATV1]

ok cool thanks alot. i'll post the final product once building starts.

[ricksmx865]

cool, you need any help just shoot me a pm

[elite ATV1]

will do heres a pic of the subwoofer

http://i141.photobucket.com/albums/r77/berettaParts/0112092141.jpg

[rbgnwa45]

Massive. Use 1" MDF. If in an SUV, port and face sub to the rear. Use rabbit joints (interlocking). Since no specs were given I'd say 7 cubic feet and port @ 33hz. Don't cut out a terminal, run the wire through the port and tape it so it doesn't flap around. Google "subwoofer box calculator", everything on 1 page that loads fast, even for triangular ported boxes etc... What amp and vehicle? I had an 05 RE XXX 12 ported on 1500W, 2 Eclipse SW8200's sealed on 1000W, in a sunfire, both pounded but the XXX is sex ported @ 35hz :eek2: . Roll by with the windows down and people staaarreee. My car was stolen last August though. Good thing I swapped the XXX out for an Atomic APX about a week before. If I had to choose I'd rather the APX got stolen :huh . Fkin' thieves. Wanna catch me one. Or all. If it's going in a car it's going to be sealed and you should have just gotten three 12's to seal.

[elite ATV1]

its going in my 1994 Talon with 1,000watt Rockford amp the subs is 550rms 1100 peak,here it is all done, Plexiglas top 2 12" blue neon's inside all it needs is a wrap.

http://i141.photobucket.com/albums/r77/berettaParts/0113090132.jpg

gimme some fabric ideas

[bah1491]

anyone want to buy a rockford fosgate T2000, ported box, and two JL W3'S????all fore sale $600 OBO

[Kickstarts-suck]

That doesn't look like MDF wood to me.

You should be using 3/4" MDF. Box is to small also.

I would do 5 cubic feet ported.


EDIT:


here are the specs

* 18" Dual 4 Ohms XE Series Subwoofer
* 1200 watts peak output
* 600 watts RMS rated
* Impedance: Dual 4 ohms
* Non pressed paper cone woofer
* Double stitching rubber surround with glass fiber reinforcement
* Die-cast basket
* Dual laminated progressive Dupont spider
* "CoilVent" T-yoke allows for greater power handling while keeping voice coils cool
* Polypropylene dust cap
* Platinum plated block terminals
* Plastic sealant gasket
* Kapton voice coil former
* Dual 4 ohms copper coated aluminum voice coils
* 200oz. Double stacked strontium magnets
* Sensitivity: 89dB
* Subwoofer Size: 18"
* Rubber Woofer Surround
* Paper Woofer Composition
* Sealed Box Volume: 1.75 - 2.50 cubic feet
* Ported Box Volume: 5.00 cubic feet
* Sensitivity: 89 dB
* Xmax (millimeters): 30 mm
* Top Mount Depth: 8.4"
* Cutout Diameter: 16.7"

[Ntensweapon]

I agree with kickstart. The box is too small, wrong material, if the plexi is under .75 inches..it going to rattle like crazy. You'll have soooo much box noise.

Like someone mentioned before use .75inch mdf, not osb. Also i like to use dado and rabbit joints, gorilla glue the joints. I use a double layer loading board (where speaker mounts). I also use undercoat inside.

You also might want to try and use dimensions of your hatch. So it fits tight between the wheel wells. That way it won't fly/slide around in the car. Friend of mine rolled his car. Would have been all right except for the sub smashing his head.

[rbgnwa45]

I've also had the XXX and the 2 SW8200's in a talon on 1500W. It wasn't good. Get deadening. Use 1" MDF, 7 cuft @ 35hz. Still won't be as loud as 2 10's with 1500W though. Why an 18? Getting another? I've seen 8 12" MTX's face-up/port-up (at the rear) on something like 8000W in an acura hatch 2-door. Thing was ballin'. Sounds like a T-Rex chase. Is that MDF or particle board? :huh