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Reload Thread: whats the best way yo face your subs?

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    phazeone's Avatar
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    whats the best way yo face your subs?

    towards the inside of your car, up, towards the back of your car...?????.....
    which of these ways would give you the most spl ??



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    Mark_ab's Avatar
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    Whatever sounds best to you is the "best way" to face them. You can corner load them for the appearence of more SPL (shaking of the car).




    Is this not a reasonable place to park?

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    Brock's Avatar
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    Originally posted by Mark_ab
    Whatever sounds best to you is the "best way" to face them. You can corner load them for the appearence of more SPL (shaking of the car).
    bingo...




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    Best way

    There are many options of how to face them. Also put into consideration what way will fit the best and you wanna be able to get to the subs, make them accessible if you need to get to them. But the best way to do it is whatever sounds good to you.



    1995 Chevy Silverado, K1500 With 350 Cubic Inches of Raw Power.

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    d audio 450's Avatar
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    ive heard of cancellation occuring from facing the enclosure towards the cabin...can anyone explain this? i have an idea in my head that im thinkin will work real well - but then again i dont understand acoustics too much
    thanks
    -pat




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    SasquatchBump's Avatar
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    Well, for best SQ I would say face them toward your hatch/trunk, that way you will get an even response at every point in your car.

    Im gonna TRY to address the cancellation issue:

    If you take two or more mechanical wave producing sources (speakers) the two fields that are produced expand in a spherical fashion. The waves from one of the speakers interfere with the other producing sources and whether they are in sync or out of sync you will either get cancellation or increased volume.

    Think of it as water waves. If you systemattically throw 2 pebbles in a pool at regular rates, the rings will interfere with each other and if they meet constructively (crest to crest /\ compared to /\, trough to trough \/ compared to \/) you will see areas of hightened waves. Where the two sources meet destructively (crest to trough /\ compared to \/) you will see dead areas with no wave activity.

    These are the points there you would have sound cancellation.

    I hope that helped a little, if you need further explination, read a physics book about dual point sources.



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    d audio 450's Avatar
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    yea- that really helps - definitley the best explanation ive heard- thanks a lot. but the one thing i dont get is where the collison of soundwaves take place.....are you saying that if you dont corner load the trunk you might have sweet-spts and dead-spots in terms of freq response? i plan on running one 15 sub torwards the cabin...cuz i dont want a rattling trunk, and i want the bass to go to my ears and not everyone elses...
    thanks again
    -pat




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    SasquatchBump's Avatar
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    Well you'll have collisions wherever you place your subs if you have 2.
    Thats why all of the great SQ competitors have 1 sub. think of the ripples. If you have
    an enclosed area such as a car, there will be some point where they interfere.

    For the most even response, face them toward your trunk/hatch because the sound waves will reflect off of your hatch and bounce back evenly toward you.

    if you want the bass to you, I would suggest putting the port facing the cabin if you have a hatch, or facing upward if you have a trunk. If you dont use your rear speakers for much and have a trunk. Remove them. and the port will be facing upward and will rock.



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    agree

    I agree. He just said it a lot more understandable than I could explain it.



    1995 Chevy Silverado, K1500 With 350 Cubic Inches of Raw Power.

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    Good article on aiming subwoofers in a vehicle in respect to phase cancellation - clicky clicky

    Hope that helps. It's backed up with factual data too, so you don't have to worry about whether or not the guy is just talking out of his *** or not.



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    interesting

    That's a pretty interesting site. I have to agree with him. Not to bad



    1995 Chevy Silverado, K1500 With 350 Cubic Inches of Raw Power.

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    paikiah's Avatar
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    it all depends, really... when I designed my faux floor and box, I designed it in such a way that the subs face the rear.

    When I plugged everything, wow, the cancellation was icredible... The subs were moving a whole deal, but was only getting pipsqueaks of bass. Also, all the bass was inside the third row cabin (I drive a minivan).

    I switched sides, and let the cones face the cabin.. wow, what a difference. There's still a LOT of bass that remains ONLY on the third row comaprtment, but I can't do anything about the natural acoustics of the car, unless I somehow make platofrms to mimic a hatchback or something.



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    i have a hatchback...however...i was thinking. Assuming the hatch is close to 45 degrees, should i aim the subs straight up at the hatch in the trunk so the reflective bass will come towards the front area? i wanted to build a box and face it towards the hatch at a 45 degree angle becasue taht could save my trnk space and according to the website mentioned above, this would help the bass frequencies reenforce each other. please give me some insight. Thanks!
    Andy



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    facing up in a hatch seem to ork well for me in a daily setup but the spl is down like hell i can only crack up 141 when facing up in my hacch back (see sig and gallery for more info)



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    so how should i face them? woudl the 45 degree way be the best then? i dont want to face them down. oh...im just going to run 1 12" Type R with a Profile 600 or 800 watt amp (300-450 RMS).
    That should sound ok right?
    ANdy



    93 3000GT SL undergoing major 2 seater conversion

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