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In this video I Show you the loudest sub woofer box I have ever seen for car audio stereo.I will give you all the measurements so you can build, make your on Subwoofer box like this one in the video. Build the Subwoofer box and install a good quality preamplifier hook it up to the car stereo. The type of bass you get from your component subwoofer doesn't depend on the woofer alone. You'll need a strong, tightly-constructed enclosure for optimum subwoofer performance. Speakers without an enclosure can't deliver full bass because the sound from the back of the speaker can cancel out some low frequencies emanating from the front of the speaker.