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Old 03-13-2009, 02:46 PM
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Default Thoughts on box for LMS-4000

After viewing TC's website, here are the ideal box req for a ported 10" lms.
1.8 ft^3
3" port 21" long.

That puts me at 21hz, and a port much longer than I can really use. SO, I'm thinking something like 3" port tuned to 27hz, witch will put me at 12". That's something I can use. You guys think that would work better? If I make the box sub & port up with it being 15" tall, 12" deep, how wide would I have to be to get my 1.8 ft^3?
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Old 03-13-2009, 02:59 PM
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Use PVC elbows in the box (the smooth curve not hard 90) and snake the port inside the enclosure. Each curve is like 9" long so you could run in 8", curve and put 4" out of the elbow and have your 21" port length. Easy peasy.
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Old 03-13-2009, 03:03 PM
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that could work to. Would PVC work with the precision ports PE sells?
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Old 03-13-2009, 03:07 PM
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Originally Posted by madmat View Post
Use PVC elbows in the box (the smooth curve not hard 90) and snake the port inside the enclosure. Each curve is like 9" long so you could run in 8", curve and put 4" out of the elbow and have your 21" port length. Easy peasy.
I have done this before and didn't end up with great results.

If you want to do it you need thin wall PVC elbows and they fit pretty well with the PSP ports.

You could save a little money and just buy the PSP flairs and make the rest out of thin wall PVC.
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Old 03-13-2009, 03:12 PM
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That's the green PVC correct?
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Old 03-13-2009, 03:12 PM
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Originally Posted by SPY View Post
I have done this before and didn't end up with great results.

If you want to do it you need thin wall PVC elbows and they fit pretty well with the PSP ports.

You could save a little money and just buy the PSP flairs and make the rest out of thin wall PVC.

I've done it on a couple boxes (one had 2 elbows) and both were fine. You have to make sure that your ends are perfectly square or you'll end up with an irregular surface at the joint of the bend which could make noise.
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Old 03-13-2009, 03:13 PM
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Oh, what part of that did you do that didn't turn out well spy?
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Old 03-13-2009, 03:13 PM
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Quote:
Originally Posted by SPY View Post
I have done this before and didn't end up with great results.

If you want to do it you need thin wall PVC elbows and they fit pretty well with the PSP ports.

You could save a little money and just buy the PSP flairs and make the rest out of thin wall PVC.
x2

I got some pretty bad port noise using the elbows on the box my brahma was in.
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Old 03-13-2009, 03:20 PM
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x2

I got some pretty bad port noise using the elbows on the box my brahma was in.
^^ That's the one I was talking about.

2 4" aeros with bends and port noise.
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Old 03-13-2009, 03:27 PM
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This is why I talked about doing 27hz. No bend needed with a 12" port. What did you have it in spy? Or did you only fondle it in the basement.
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