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car audio 12 subwoofer
To put that in a useful way, it would be connecting the amplifier's positive terminal to the positive terminal of the first speaker and then connecting the negative terminal of the first speaker to the positive terminal of the second speaker and so on. 785 x Diameter x Diameter When you are making more than one driver enclosure, you'll get the best results when you isolate each driver in a separate chamber. Vented enclosures, which are also known as ported or bass-reflex systems are harder to do than sealed boxes, but they offer extra construction work that is necessary if you want to install a vent which is something that will have its own rewards in the long run. Where should I place the port? Once you have the speaker and port openings are cut, you need to put some silicone sealant on the tip of your index finger and reach all the way into the enclosure to seal the inside joints of the baffle board.


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The tone generator is a nice addition to it and is very helpful. As for the thickness of the wood, 5/8-inch will suffice for enclosures with internal volumes of 2 cubic feet or less; for larger boxes, you will want to use 3/4-inch material. Before you saw, you will need to be absolutely sure that the enclosure will fit in your vehicle.

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Subwoofer Plan Samples


Please note that these were located at http://www.caraudiohelp.com/plans_for_subwoofer_enclosures/plans_for_subwoofer_enclosures_sealed.htm


Plan #1 - Sealed Subwoofer Enclosure

WinISD recommends a 1.55 cubic foot box for our sealed enclosure. We'll achieve this by using 3/4 " MDF for the enclosure with external dimensions of 15.5" x 24 " x 10 ". This will be a simple rectangular box. Modeling the enclosure we see that it has a 87 dB sensitivity and a -3dB (half power) frequency of 42 Hz. This box should give very strong output when it is combined with the 12dB/octave boost provided by most automobiles.

JL Audio 10W1

SPL (1W/1m) - 87 dB
-3dB @ 42 Hz

Here is the layout of our subwoofer enclosure. We will need to cut the following pieces:

SIDE QUANTITY DIMENSION
TOP/BOTTOM 2 24" x 10"
FRONT/BACK 2 24" x 15.5"
SIDES 2 15.5" x 10"


JL Audio 10W1 - 1.55 cubic ft


Plan #2 - Vented Subwoofer Enclosure

WinISD recommends a 3.2 cubic foot box with a 24 Hz tuning frequency for our vented enclosure. Using a four inch port we'll need a vent that is fifteen inches long. We must take this volume into account. The volume of a cylinder is pi*r2*h, or (3.14)*(2)2*15 = 188 cubic inches. Divide this by 1,728 to get cubic feet and we add 0.11 cubic feet to the enclosure.

We'll achieve this by using 3/4 " MDF for the enclosure with external dimensions of 19.5" x 30" x 12.5". This will be a simple rectangular box. Modeling the enclosure we see that it has a 87 dB sensitivity and a -3dB (half power) frequency of 24 Hz (the tuning frequency). This box should give incredible amounts of output when it is combined with the 12dB/octave boost provided by most automobiles. This is to be expected with a box this large. In practice we would probably make the enclosure half this size, or similar to the size of the sealed enclosure.


JL Audio 10W1

SPL (1W/1m) - 87 dB
-3dB @ 24 Hz


Here is the layout of our subwoofer enclosure. We will need to cut the following pieces:

SIDE QUANTITY DIMENSION
TOP/BOTTOM 2 30.5" x 12.5"
FRONT/BACK 2 30.5" x 19.5"
SIDES 2 19.5" x 12.5"




JL Audio 10W1 - 3.3 cubic ft