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Thread: Subwoofer, face forward or backward?

  1. #21
    Variable Bitrate cheerio's Avatar
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    http://www.installer.com/tech/aiming.html

    im am reading my car audio installers magizine, and i see a article on here. It says the reason the bass sounds louder with the trunk open and the subs facing the front is because of cacellation when the trunk is closed. The subs facing foward is the tightest responce, and the best way to do it is. have the subs facing the rear deck upwards, and SEAL IT OFF(from the trunk) 2 seperate sealed boxes, this way there is no cancelation. If i had a scanner i would scan it but i do not. But that is what it says...

  2. #22
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    Quote Originally Posted by Huflungdung5342
    I've read that the reason why many people face the subs towards the back is it takes the sine wave about 18 ft. to reach it's peak so it sp the sub fires and the wave bounces back a longer distance than if it were just facing foward
    Boom! Physics to the rescue! Of course, it matters what frequency you really want to peak when it gets to the listener - the lower frequencies have longer wavelengths (by definition), so it depends. If you want the peak at a frequency that is shorter than the reflected distance (source to back to listener) it might be better to have them facing slightly upwards, or forward from the very back, or some other innovation.

    In some cars (like my Pathfinder) it doesn't make much difference what you do, especially if you listen to music with varying bass frequencies. Some will be at perfect resonant wavelengths, some will be too long, some will be too short. Physics will explain it, but your ears will tell you what sounds good and what doesn't.

  3. #23
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    you can also add loading panels to the box to simulate loading agasint objects in the vehicle, and it can work just as well. without facing the box in a potentially funky direction.

  4. #24
    Variable Bitrate cheerio's Avatar
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    Quote Originally Posted by WhiteRabbit
    you can also add loading panels to the box to simulate loading agasint objects in the vehicle, and it can work just as well. without facing the box in a potentially funky direction.

    what do you mean by loading panels?

  5. #25
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    when you rear fire, as iper the final drawing of eddies page, that is a loading panel. you are using the rear of teh trunk to load waves off of.

    when you downfire your subwoofer in your home theater, you are using the ground as a loading panel.

    and when you take a piece of MDF and some 5 inch spacers, and screw it on top of the woofer so the woofer fires directly into MDF from 5 inches away, that is plane loading the box.

    doing that lets you put teh box anywhere and still load the waves so they are in phase as per eddies page.

  6. #26
    Top Ramen lgbr's Avatar
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    This is a lot of discussion for just turning a silly box around.

    Just try it both ways and see how you like it! Jesus.
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  7. #27
    Constant Bitrate CHUPACABRA's Avatar
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    Quote Originally Posted by lgbr
    This is a lot of discussion for just turning a silly box around.

    Just try it both ways and see how you like it! Jesus.
    LOL Right!!!
    It all depends on the car it self how its gona sound.
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