DIY cylinder sub-woofer [message #41574] |
Mon, 09 June 2003 15:27 ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
Mark Korda
Messages: 12 Registered: May 2009
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Chancellor |
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Hi all, I need some advice. I plan to build a sub-woofer. I have sitting in my apartment a PVC 12 inch in diameter green water company tube that you all have seen at construction sites. I have a 12 inch Titantic sub-woofer that I want to connect to the tube in a down firing position. The tube is 2 and a half feet long, roughly giving me 2 and 1/2 cubic feet of volume. I'm going to cap the end and if I have to use a variovent on the top end. Is this enough volume for the 12 inch Titantic from Parts Express? Will increased Dacron stuffing or egg crate increase interior volume? Boy, I would really apreciate some ideas here, I have most of the speaker design books but spent some time in summer school way back for algebra and trig etc..... Thanks all.... Mark Korda
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2 cu ft sealed box [message #41579 is a reply to message #41574] |
Tue, 10 June 2003 04:19 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
JLapaire
Messages: 156 Registered: May 2009
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Master |
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The P.E. catalog suggests 2 cu ft sealed box with 50% fill. I agree with Steve about not down-firing this driver. It's just too floppy to stay linear over time. John
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Re: DIY cylinder sub-woofer [message #41580 is a reply to message #41574] |
Tue, 10 June 2003 05:52 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
Bill Martinelli
Messages: 677 Registered: May 2009
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Illuminati (1st Degree) |
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Hi Mark, If your water pipe is 12" id and 30" long you'll have 2 cubic foot as John suggest. I have read that the egg crate is not the hot setup. 50% fiber fill sounds better to me. If this driver is not suited to mount vertical, You might find a nice spot for it to lay down along a wall or behind the couch. If your driver is not going to fit exactly into the tube. You can cut a ring from 3/4 ply. Predrill and screw the ring to the tube radially and you can then mount the driver to the ring which has now become a face flange to the pipe. I like Wayne's Idea. lots of options for the parts you have. Bill
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Re: DIY cylinder sub-woofer [message #41585 is a reply to message #41574] |
Tue, 10 June 2003 15:18 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
Mark Korda
Messages: 12 Registered: May 2009
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Chancellor |
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Hi, I would like to thank Bill Martinelli, J Lapaire, Steve F, and Wayne Parham for their input on my question. I came up with the answer with their help. I'm going to get the sewer pipe out of my apartment and have already ordered the 3 cubic foot enclosure that Parts Express sells made for the Titantic. If you guys read this I say many thank yous for your time. I do have one more question, What would you stuff it with, Dacron, loose or tight, or egg crate foam as I did in my mini monitors that I built with Woodstyle 602 and variovent. Thanks, Mark.
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