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yzeffer
Dodge Dakota
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8/13/2006
11:37:59
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 Subject: CC Sub Placement...
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I have an 01 CC and I had all intentions of building a box to fit under the seats. Im installing 2 10" pioneers with a mounting depth of about 6in. I got to looking and has anybody tried or thought about building a box to fill the gap on the left and right side of the seat between the body panel and interior support? Would the subs being pointed at each other cause any problems, i would like to angle them forward slighty as well. Thanks for any help. Just looking for something a little different and to use completely wasted space.
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Odessa
Dodge Dakota
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8/30/2006
23:25:53
| RE: CC Sub Placement...
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Don't point your subs at each other. It's like pointing '+' and '-' at each other. What does +5 -5 equals? Right, 0 sound!!!
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Audiophile72
Dodge Dakota
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8/31/2006
11:27:57
| RE: CC Sub Placement...
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I wouldn't worry too much about the drivers facing each other. There's enough distance between the two that it won't matter a whole lot. Low frequency isn't as susceptible to cancellation as higher frequencies because of SPL. Tilting on a bit of an angle will help though if you want to be sure.
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DSW
Dodge Dakota
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9/01/2006
02:34:36
| RE: CC Sub Placement...
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Pointing your subs at each other won't cancel out the sound. If you have one of the subs connected reverse polarity, they will definately cancel each other out and this would be worst if they are pointing at each other. If you have the subs "phased" 180 degrees out from each other, they basically cancel each other out, when one is going out the other is going in = no noise
If pointing speakers at each other cancelled out sound, your door speakers wouldn't be making any sound.
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Audiophile72
Dodge Dakota
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9/01/2006
10:51:11
| RE: CC Sub Placement...
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They don't cancel each other out, but they can have an affect on the spectrum of sound. This would be more evident if the drivers were exactly across from each other and running the exact same sine wave in phase with each other. This would pretty much never happen with a stereo signal on 2 independant channels.
Running your subs facing each other and running one reverse phase would not cancel each other out. It is called Isobaric loading of the drivers. Advantages of this design are increased linearity in the speaker movement, lower space requirements, and increased power handling. By isobarically loading the woofers, a box of only half the size of a one woofer box is needed.
Disadvantages are increased cost, increased design and assembly complexity, and decreased efficiency as you generally experience a decrease of about 3dB.
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DSW
Dodge Dakota
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9/07/2006
04:28:10
| RE: CC Sub Placement...
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"Running your subs facing each other and running one reverse phase would not cancel each other out."
Well,,, I guess you have never tried it,,, or never hooked up a sub backwards because they WILL cancel each other out, try it. When one speaker is pushing a volume of air the other speaker is pulling the same amount of air, cancelling the signal of the 1st speaker. This also has nothing to do with an isobaric loading since both speakers are not loaded into an isobaric enclosure.
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Audiophile72
Dodge Dakota
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9/09/2006
15:53:55
| RE: CC Sub Placement...
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Isobaric actually refers more to the method of mounting the drivers and not the enclosure itself. I used this as a point in question because you said you cannot have two drivers and run one out of phase. Obviously it has nothing to do with the original posters circumstances.
What you are referring to is 'Destructive Interference' when running something out of phase. You can still experience DI with your sub, single or duo, being IN phase, interfering with the (mid)bass notes of the regular drivers in the cab. It's actually somewhat difficult to have your whole system 100% in phase with with each other.
Yes, in exacting cirsumstances it is possible for DI to cancel out your signal. DI occurs when two exacting signals (wavelengths) occur at the same time and outputting the same power. The peaks of one signal match up to the valleys of the 2nd signal and the resulting new wavelength could have no audible response. It has nothing to do with the amount of air that is being moved.
It also has a lot to do with environment and everything else that's going on in the listening space. He may experience a lower power, dull/flat signal but it is unlikely he will cancel 100 per cent of his signal and end up with nothing.
Actually, I have tried it and just about everything else as I have been building custom enclosures and systems for both home and automotive for 15 years.
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DSW
Dodge Dakota
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9/11/2006
19:34:46
| RE: CC Sub Placement...
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So your agreeing with me,,, in a round about way???
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Audiophile72
Dodge Dakota
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9/12/2006
13:19:11
| RE: CC Sub Placement...
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Yes, in a round-about way, I suppose I am. In either circumstance I think we're both agreeable that it's something he definitely does NOT want to do. : )
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?
Dodge Dakota
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4/24/2007
02:40:06
| RE: CC Sub Placement...
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WTB Barrens chat
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cj
Dodge Dakota
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4/24/2007
04:12:50
| RE: CC Sub Placement...
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Don't aim your subwoofers at each other please.
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