Wood glue and some screws or a nail gun is all it takes to hold this stuff together, so if you are looking to build a basic enclosure, this is the best material for it. htm. You may need to use a knife or blade to cut the grommet so the wire will go through though.
caraudiohelp.
In such cases, the entire dash panel may need to be removed. This was discovered through research done by Fletcher and Munson and the drawing below shows the "Fletcher-Munson" curve. It even prints out the cut sheets for your car subwoofer box plans so that you dont have to. In general, 1/4" of fiberglass is roughly the equivalent to 3/4" of MDF when you view it from a structural standpoint, so a box for two 12' subwoofers might only weigh 15-20 pounds if it's built from fiberglass instead of MDFs 50 pounds.
In its best form only one loudspeaker on each side would be needed to reproduce the entire audio spectrum.
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
Compact Car Subwoofer - I haven't used it personally but it's fairly popular and free.
You should note that the type of joint that you choose to use is not critical as long as the box is strong and airtight. Connect the subwoofer's ground wire to a suitable grounding location. So lets get going! Decide upon a point in the firewall to run the power wire through to the inside of the vehicle.
Car Subwoofer In Home Theater System - That is why you must remember to disconnect the negative battery cable before doing any work on a stereo system.
Take out all the hardware from the box your speakers came in. You may wonder if these people are just handy men who love to do-it-yourself. Here is the layout of our subwoofer enclosure.