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Old 09-29-2009, 07:37 PM
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Default Interesting box design. Help?

After many attempts at making a box for a 15" TSNS to fit into my Nissan Altima without modifying the chassis, I finally found a plausible solution.



Gross volume:4.448 cubes(Estimated motor size and cone displacement subtracted from net)
Possible port length: ~47", lowest possible tuning 29.5Hz
Sub: 15" T3 TSNS
Port: 10" PVC pipe/aero, 78.5in^2
Power: ~4kW+

It uses a 10" PVC pipe as the port, and it's path is indicated by the bold line on the right side of the picture, with the hole being the cutout for it. I will cut elbows by using a band saw to cut it at a 45, then twisting the pipe so that it will form a 90, clamp and apply putty epoxy internally and externally where I can. Who knows? I might clump it on the outside internal to the corner, and internally on the outside of the corner, and sand it down to a nice fillet-like corner.

I am bracing it primarily with lead screws, but the mounting face has a double baffle.

The main issue I am having in my head is that the port is fairly close to the sub. Will there be a loading issue?

Other questions: Is there:
Too large of a port? I am able to get the full length for tuning. Possible loading issues?
Port noise possible due to the elbows/non flared ends?

Thanks again.

Last edited by MakeshiftAudio; 09-29-2009 at 07:39 PM.
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Old 09-29-2009, 07:42 PM
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w/ a port that big, i doubt you'll have port noise, but it may cause loading issues. 29hz is pretty low, especially for a tsns.
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Old 09-29-2009, 07:57 PM
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Ah, I see.

Well, I am doing a daily thing, and I was figuring I would go 32 or 30, depending on a couple of things. I also have the capability to make it adjustable, since the 10" pipe I have has the flared part to connect it with another piece of PVC. Take a section off for SPL burpage.

What freq would be good for a TSNS? I know it's a rather SPL oriented driver, but I've heard it has great opportunity for a daily application.
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Old 10-05-2009, 01:59 PM
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personally if youre bent on using external, id usea pair of 6's and angle them the same way as you have it on there, except i'd end them at the face of the box, so they are on the same plane. the tuning should remain near the same........thats an educated guess at the tuning....try it out
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