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  • Sub woofer placement

    Since the audio forum has vanished, and this would have been posted there, I have also posted on dedicated car sound forums but those guys are whacked and the answers didnt make sense to me..they claim the low frequencies etc are not direction dependent (whilst true, why should the sound travel backwards before going forwards to me ? surely there is a loss of performance if they fire backwards ?), and the dedicated car audio guys it all about looks looks looks seem more important than practicality and USE, I want to hear them.

    I have two 10 inch subs in a box, now I can place this box in my trunk in four ways, the first is facing forwards to the rear seats, (which flip down if needed) then I can place it with the subs facing into the trunk all with the subs at a 90 deg angle ie perpendicular to the trunk fllor, or with the subs aimed up at about a 30deg angle either into the trunk or into the cabin.

    The problem is once I begin my install I cant just decide to reposition the subs as the box forms part of my install for other components, please let me have your comments on the best way to position the subs ?

    Thx
    Nano ITX / 512 MB / 60 GB / Panasonic slot load / M1-ATX / Bu303 / Sound blaster 24 / PPi amps / rockford sub

  • #2
    Man there' wayyyy too much to go into about this, but I'm gonna keep it simple as you should. Buy you some high end subs and they'll be so loud you won't care which way there facing, you'll be trying to underpower them.

    If that's not an option the best thing to do is do tests with the box. Listen to the speakers faceing fwd and backward.

    I'll say this, it is better in certain cars for woofers to be pointed into the cabin. Ideally if you were in say a hatchback that'd be the best thing to do.

    Since most of us don't have hatchbacks we have to adapt to the dyanamics of trunks. To get the best possible pump out of a sub with the trunk lid closed you could place the speaker facing away from the cabin and right up against the front of the trunk(back of the car). There's debate there of course but since the woofer is closer to the edge of the trunk it's not canceling out the wave that it's creating.

    That's about all I feel like delving into about this right now, but if you have more questions post up.
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    • #3
      Originally posted by falconey
      Man there' wayyyy too much to go into about this, but I'm gonna keep it simple as you should. Buy you some high end subs and they'll be so loud you won't care which way there facing, you'll be trying to underpower them.

      If that's not an option the best thing to do is do tests with the box. Listen to the speakers faceing fwd and backward.

      I'll say this, it is better in certain cars for woofers to be pointed into the cabin. Ideally if you were in say a hatchback that'd be the best thing to do.

      Since most of us don't have hatchbacks we have to adapt to the dyanamics of trunks. To get the best possible pump out of a sub with the trunk lid closed you could place the speaker facing away from the cabin and right up against the front of the trunk(back of the car). There's debate there of course but since the woofer is closer to the edge of the trunk it's not canceling out the wave that it's creating.

      That's about all I feel like delving into about this right now, but if you have more questions post up.

      So when a sub box says "rear firing design" it doenst mean to put it with the woofer facing away from the cabin but right up against the back seats? If the cone had to be facing towards the center of the trunk, for practical purposes, should it be from the sides or from the back of the backseats?

      Thanks for the advice, i too am planning on a semi-permanent installation and care about placement. Granted, like falconey said, my JL 12W6v2 is loud anywhere, i just want to get the best out of it!
      Cheap Laptop, great for Carputer!

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      • #4
        jusatry your question is different from the original. The original was more of a general question about the best way to place subs. For your question about a specific box I'll just refer to your description. If it says rear firing I'd say point it towards the rear. Also if you give that JL enough power no worries my friend unless you're trying to compete. I'd say though if you don't have a hatchback, face it away from the cabin and if you can get it as close to the front of the trunk(or what would be the back of the car) as you can while still facing away from the cabin. Otherwise if you're not worried about losing the little sound that you probably won't even notice then just put it in the most convenient space saving spot while facing it towards the rear.
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        • #5
          The reason you point your subs to towards the rear has to do with the length of sounds waves at lower frequencies. The waves are longer as the frequency gets lower. What you are trying to do is get the wave to meet you at your drivers seat. Different subs have diferent frequency response so you will have to try positioning your subs in your trunk in different ways to achieve the best sound. Either front facing against the back of the seats, pushed back against the back of the trunk/car, rear facing with the box against the back of the seats or rear facing pushed to the back of the trunk/car.
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