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Dash speaker positioning

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Old Nov 18, 2006 | 10:21 AM
  #21  
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I have to say that fozz is correct. Impedence has much to do with frequency response, and using a resistor in place of a cap would not help the situation. And with the quality generaly attached to coax speakers, you would surly pop your tweeter with little effort.


A for dash mounted mids, I think in most cars you will have serious issues with PL. So if you have TA at your disposel you will have to use it. Glass reflections can also wreck your tonality and your staging, so be aware of this when you position your mids.
Old Nov 18, 2006 | 10:37 AM
  #22  
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Originally Posted by fozzz
True, but a 4ohm tweeter and a 4ohm woofer don't add up to make 2 or 8 ohms. They would still be 4ohms, LOL. That's really what I'm saying.
Only true when they are separated with a passive crossover.

The impedance plot of your run of the mill coaxial can be pretty interesting.
Old Nov 18, 2006 | 11:40 AM
  #23  
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That's what I'm saying! And the cap would be the passive filter in question.
Old Nov 18, 2006 | 01:14 PM
  #24  
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Originally Posted by RookieSQ
A for dash mounted mids, I think in most cars you will have serious issues with PL. So if you have TA at your disposel you will have to use it. Glass reflections can also wreck your tonality and your staging, so be aware of this when you position your mids.
I agree...... also the (midrange region:300-3K= approx 3' - 4") standing wave issue will cause comb filtering up by the dash & glass which will destroy dynamic performance of any good midrange drivers. unless dispersion pattern is controlled tightly.

even though position of placement still might work to some degree with some TA applied, but it'll sound lifeless.

The kick panel is a much better position for the mid in most cars IMO.
Old Nov 18, 2006 | 04:06 PM
  #25  
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You can actully purchase comps that allow center tweeter mounting or also known as "Convertibles" they have the ablilty to mount in the center of the mid or externally and come with a full external x-over. That might be the solution for this issue.
Old Nov 18, 2006 | 07:34 PM
  #26  
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Originally Posted by Smartass
You can actully purchase comps that allow center tweeter mounting or also known as "Convertibles" they have the ablilty to mount in the center of the mid or externally and come with a full external x-over. That might be the solution for this issue.
Originally Posted by SQ Civic
What about 2-way component sets that can be eiter mounted as a coaxial, or seperate system?

Mark


Mark
Old Nov 19, 2006 | 12:02 AM
  #27  
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OR you just buzz an appropriate size hole for the tweeter in the grill for your mid.
Old Nov 19, 2006 | 05:05 PM
  #28  
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Originally Posted by ChinaMan
I've been debating this for a long time now and although amazed at the DLS Audi A4 @ the 2005 CES show, I'm not sure if I want to go that route. For those of you who don't remember, never saw pictures, or never went... basically a tweeter and a midrange were mounted in seperate spheres mounted by the a-pillar on an adjustable arm. These spheres were cnc cut aluminum. I have a pic, but it's going to take a while to dig them up.

I've drawn up some parts on Solidworks to get prototyped and before I go ahead with it, I would like everyone's opinion on this. I currently have a design similar to the DLS one - tweeter pod + midrange pod. What I'm thinking about now is making only one sphere and mounting the tweet directly infront in a coax style. My guess is this would ease imaging and minimize time alignment fine tuning.

Any thoughts? Suggestions?
Well I will be trying the same thing in my Fusion. Have to wait to get it before deciding on placement. The main reason was that I am kinda stuck with 5x7/6x8 in the doors. Thought of using my PolkMomos 5x7 in the doors up to about 500Hz then crossing to the DLS mids and highs. Full electronic xover. That way the door speakers will only handle lows and not be to critical for imaging. I hope at least.
Unfortunate that this thread turned into a cheap coax crossover rant.
Old Nov 19, 2006 | 05:54 PM
  #29  
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Originally Posted by SQ Civic


Mark

Opps sorry bro sleeping.
Old Nov 19, 2006 | 06:37 PM
  #30  
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Originally Posted by ChinaMan

I've drawn up some parts on Solidworks to get prototyped and before I go ahead with it, I would like everyone's opinion on this.
Any thoughts? Suggestions?
actually, before you commit, it would be wise to try the speakers temporarily in different positions. See how they sound first.



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