Need help with port length / size based on my enclosure

11344 Views 80 Replies 7 Participants Last post by muzz, Mar 23, 2015

TX1978

Discussion Starter · Feb 13, 2015

I will soon be embarking on my first sub build, and plan to put the enclosure inside a current wall void. The internal box dimensions that I came up with are as follows; 1.16' wide x 3.256' tall x 2.08' deep. This nets 7.9 cu ft for a Dayton rs5390hf. Don't worry about room between studs. I will handle that.

Since this will be "in wall" the driver and port will need to be on the front face. What size and length port do I need to hit 18 Hz?

Thanks!

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chrapladm

· #4 · Feb 16, 2015

Why inwall?

If I was only given one spot to put a subwoofr and HAD to use an inwall location I would somehow make it dual opposed. That would cancel out most mechanical vibrations. And a room your size with 8m is going to need a lot more than a single ported 15. Why not just buy as many SI 18HT's as you can afford?

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chrapladm

· #45 · Mar 13, 2015

If you take a video we could all see what your talking about. The THX demo has quite a bit of ULF content. Do you have a Hpass on your subwoofer?

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chrapladm

· #55 · Mar 14, 2015

Says video is removed or deleted. SO I cant see it. I havent a clue what your Hpass is set at from your AVR. BUT without having a Hpass where it needs to be you could easily damage the driver when listening to the THX scene if at reference or close to it volume.

There is quite a bit of movement pass Xmax for protection but that goes quick below the port tune.

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