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Two different speakers in the door panel?


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blazinls1 
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Posted: November 24, 2005 at 12:01 PM / IP Logged  
My question is this:
Will I run into serious problems by having an 8" Bass driver in the same door, same airspace, with a 6.5" Midbass driver??? Any Distoration, Interference??
I am in the process of building a system in my 2001 Corvette. I will be putting in the following into each of the doors (custom doorpods):
1 - (a 1" Tweeter) XR650-CSI
2 - (a 6.5" Midbass driver) XR650-CSI
3 - (an 8" Bass driver) 8W3v2
All three of these components will be using the airspace inside the door itself. None of these drivers will have their own, seperate, enclosures within the doors.
I do NOT have space to mount the midbass and bass drivers away from each other, not to mention I like the look of having both drivers, with the tweeter, in one door.
ANY advice would be GREATLY appreciated!
Thank You
-Alex
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 24, 2005 at 12:06 PM / IP Logged  
With a proper crossover it'll be fine.  Seal up the door as best you can, use plenty of sound deadener.
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blazinls1 
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Posted: November 24, 2005 at 12:12 PM / IP Logged  
Hmm.. I really hope so because from the way I imagine it, the 8" sub will push the air out on a certain note, and at the same time, it will also push the 6.5" cone of the midbass driver... thus doing something to the sound of the 6.5"
blazinls1 
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Posted: November 24, 2005 at 1:24 PM / IP Logged  
ttt Can anyone suggest any source to find SOLID information on achieving something like this?
I have several random tutorials that are not exactly what I'm looking for.
DYohn 
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Posted: November 24, 2005 at 2:02 PM / IP Logged  
It's called a standard 3-way system.  Loudspeakers use this arrangement all the time.  If you are worried about damage to your mid, then use a small enclosure for it or use one with a sealed back.
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blazinls1 
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Posted: November 24, 2005 at 2:18 PM / IP Logged  
Good point, I've seen the inside of loudspeakers before and they DO use one sealed cabinet for all three drivers.
I'm not worried about damage as much as the sound quality factor.. but it seems that no one has said that it will affect sound quality, I'm assuming it is same to go ahead and try this...
mi_what 
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Posted: November 24, 2005 at 7:40 PM / IP Logged  
I could be throwing usless information out there so feel free to shoot it down, but it works for inverted subs. Wire the 6.5" or the 8" backwards. When the 8" driver is wired right and the 6.5" driver is reversed they almost work in motion with each other and little if any distortion is present.
blazinls1 
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Posted: November 24, 2005 at 7:46 PM / IP Logged  
XTC Foam Baffle?? I've never heard of these, how exactly am I supposed to use them correctly? do they basically isolate the 6.5" from anything else in the door?
stevdart 
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Posted: November 24, 2005 at 10:37 PM / IP Logged  

attention mi_what:  consider it shot down.  There are no inverted woofers in this door installation.

blazinis1:  your question was answered by the first reply, DYohn's.  You don't need more than that, believe me.  Install the drivers, separate the frequencies to them properly as a 3-way must be done, and see what the results are.  It will most likely be fine.  After the install, if you find that you want to experiment with isolating the mid driver, you will need to learn how to enclose it with the proper amount of airspace it needs (using something like Unibox).  But go that route only if you have to because both drivers will most likely benefit from using the infinite baffle airspace that the door cavity provides.  And as DYohn said, damp and seal the doors VERY well.

Otherwise...when you get replies about things you haven't heard of, a 2-second look with a Google search will yield all the info you need:  http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLG,GGLG:2005-35,GGLG:en&q=XTC+foam+baffle

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
blazinls1 
Member - Posts: 34
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Joined: November 23, 2005
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Posted: November 24, 2005 at 10:58 PM / IP Logged  
Yeah I've already picked out the XTC foam baffles that I may use. Sorry that I didn't update that..
The doors will be very well covered with B-quiet Ultimate and some Lcomp foam. Basically, they will be sealed completely. I will try the door panels with the three drivers using the same airspace. If I notice anything strange, I will put in the foam baffles.
I appreciate everyone's help.
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