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18 inch car subwoofer
In most cases, this will mean taking it apart and removing certain parts of the dashboard or trim. 5 cubic feet of internal volume if you want the best performance, while a 12-inch subwoofer requires 2 to 3 cubic feet. Now that all of the harder work is done, we are on to the easier part. However, I can say that there are a few for which the T/S parameters suggest that they can produce good results in the home. Drill the holes and mount the speaker in position. Remove the old speakers, making sure to note the polarity of each terminal.


install sub woofer
Then drop the door panel back onto the door. This will certainly make your task more difficult, and it will affect the overall performance of your car because of the added weight, so it's something to keep in mind when designing your sub system. The primary source of power when the vehicle is running is the alternator. We used to think that the boom box was a great adventure in sound. For example, if you need to figure out the current (amps) moving through a 12 volt circuit and you know the resistance of the circuit is 4 ohms; the equation would look like this: E = 12volts I = unknown R = 4 ohms I = E/R or I = 12/4 which is I = 3 ampsP = E*I (power equals voltage multiplied by current or watts = volts amps). Turn on the amp.

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Selecting your Material


Fiberboard is really the best material that you can use for the walls of your enclosure, since its high density will minimize the panel vibrations and you will end up with a more efficient enclosure. Don't confuse fiberboard with particle board however as they are quite different. Although particle board looks a lot like fiberboard, its physical properties make it unfit for the car because Extreme temperature variations and humidity can cause particle board to chip, split, or warp in some way.

Plywood is a decent choice too if fiberboard is not readily available. Plywood is not as dense as fiberboard, but it has the advantage of weighing only half as much, making it much easier to work with. If you choose a laminated wood, make sure that it has no defects. The reason for this is because imperfections in lamination can cause your enclosure to make a buzz or rattling noise. 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.

When you want to join the pieces of your enclosure together, your best bet when doing this is to use screws. Nails work too, of course, but they can loosen over time; especially if you're building a removable enclosure that will be going through some abuse. Other materials you'll need when building your enclosure will include carpenter's glue, silicone sealant, spray adhesive, and various finishing materials.