Sealed Mdf Sub
2009
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Tips Or Plans For A Quad Subwoofer Enclosure?
Im am planning on making a subwoofer box to fit Four 12" Subwoofers, the wood i will be using is 3/4-inch MDF wood, The sub needs a Minimum of 1cu^3 of area and a maximum of 1.5cu^3 volume, The box i want to make needs to fit a 1997 Plymouth Neon, and i ive calculated that in order for the minimum of One Cubic ft area the sub needs, i will need to make four boxes that are 13.5 inches, that means 13.5 x 13.5 x 13.5, But they will all be sharing a wall because each box will be sealed for each sub. Any tips on anything to do for this? or know of any plans i can use to do this?
First of all, the biggest and most common mistake I see made is too small of a box for a given subwoofer. It's always better to go with the bigger box. Why do you think home floorstanding speakers utilize large enclosures? Four 12" Subs in a '97 Neon is too many woofers and not enough airspace. No matter what a sub manufacturers claims, any sub can play in a smaller enclosure - at the expense of sacrificing the ultra low bass frequencies. My single 12" subwoofer enclosure has a net internal volume of 2.3 cubic feet. Note that I designed this for MY particular sub when using the sub's T/S parameters to calculate enclosure volume for my desired bass response. This yields a Qtc of 0.7 for some LOW and accurate bass. Second, a cube shape is the worst possible shape for any speaker enclosure due to the intense standing waves created within the enclosure. A cubed box will exhibit a huge response bump at a certain frequency that no amount of equalization will fix. If you really want great bass then I suggest you do some research on the "golden ratio" or acoustic ratio in regards to enclosure dimensions. Also, if you can get your subwoofer's T/S parameters there are many online subwoofer enclosure calculators that can aid you in designing an enclosure that will produce the type of bass response that you want and still have room in your trunk for other things besides just a huge and heavy box. Keep in mind that when designing a box you have to factor in the driver displacement as well as any internal bracing and/or dividers. Hope this helps. Good luck.
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