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Old 10th February 2013, 01:16 PM   #1
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Default Short bandpass

I'm designing a center console for my early bronco and wanted to incorporate a sub. I decided on a bandpass as a way to protect the sub from sticks, branches, elbows, etc, but am starting to question if I have enough room.

I was planning to keep the width to 8", however, while working on my cad design, i've found that I can not keep the 8". The sub has a mounting depth 5 13/16, so to keep the end of the sub off the wood, I'm making that 6". Using 3/4 MDF, I've only got .5" between the sub mounting surface and the opposing wall. Problem is the xmax of the sub is ~.55". So I am pushing the opposing wall out .5", as I am constrained on the mounting surface. This will make the whole console 8.5", but it will give me 1" gap from the sub mounting surface to the opposing wall, .45" between xmax and the opposing wall.

The sub is an Infinity Kappa Perfect 10.1


The question is, is 1" enough? There will be more to the console that the port will expand into.

This picture may help understand what I mean.

Click the image to open in full size.

Last edited by lonesouth; 10th February 2013 at 08:53 PM.
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Old 10th February 2013, 05:42 PM   #2
OscarS is offline OscarS  United States
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would help if the picture worked
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Old 10th February 2013, 08:16 PM   #3
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Quote:
Originally Posted by lonesouth View Post
I Using 3/4 MDF, I've only got .5" between the sub mounting surface and the opposing wall. Problem is the xmax of the sub is ~.55".

The question is, is 1" enough?
If 1" is more than Xlim or Xmech, it is plenty.
If less, not so good, but you will be able to hear when the cone exceeds Xmax .
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Old 10th February 2013, 08:54 PM   #4
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Quote:
Originally Posted by OscarS View Post
would help if the picture worked
DOH!

Now I feel like a noob. Fixed the picture and added a link to the sub.

Thanks.
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Old 11th February 2013, 04:40 AM   #5
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Instead of doing a bandpass, I'd simply do a slot loaded box.
Due to your tight space, it's going to be hard to squeeze the front chamber and the port into that space.

If you're trying to protect the sub from damage, slot loading will work well. Keep in mind that slot loading will limit your bandwidth, but as long as the volume of air in the slot is small, you should be good up to 200 or even 400hz.
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