How thick do vent walls need to be.

[Jloc707]

First off, thank you for taking the time to come and help answer my question.

I'm building a slot vented enclosure for a 12' Type R, and I have pretty strict outer dimensions I would like to stick to. My questions is whether or not the walls of the vent need to be constructed out of 3/4" MDF like the rest of the enclosure. I think I have done a good job of maximizing the vent length, but I need to lower the displacement of the vent to hit the tuning frequency I'm shooting for.

I was thinking to help cut down on vent displacement I could use either 1/2" MDF or even 1/4" on certain non load bearing walls. I just don't know what kind of forces the vent walls need to withstand, or if overly thin walls will lead to vibrations, although part of me thinks that if the vent walls vibrate it will aid in the resonation of the vent.

Any insight you guys can offer into this situation would be much appreciated. Personally, I don't thick the vent wall thickness is all that important long as the vent built well, but I'm here for your guys' opinions.

Thanks again for your time,

-Jared

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[adulbrich 5,000+ posts]

Half inch is the lowest I'd go. I don't know why your outer dimensions are so strict, but you may consider an aeroport (circular port). I use these in my car, because I have small spots for boxes and wierd shaped space. You can make an external aeroport that doesn't take space away from your internal box volume. You can also tune them easily without building a new box.

 

[fasfocus00 5,000+ posts]

thick enough to not cause resonance

 

[hispls 5,000+ posts]

You really don't want to skimp on port walls. Port will build up a lot of pressure and results will be very poor if they are not completely rigid.