Posted April 28, 201114 yr Hi ladiess and gents, I have been thinking about my next subwoofer enclosure. To be a little different and it sounds to be a fun project, I wanna try and build a sonotube enclosure. Has anyone here had any experiance with them, good or bad? I also scoured the web and I can't seem to find prices or anywhere that sells sonotubes by the foot. Are there other names they go by? I am getting an 18 nightshade so there will be bracing and all that stuff. I'm looking to get a 24 inch dia. tube to keep the length down. Thanks.
April 28, 201114 yr Ive only seen them used in HT systems or fairly small car systems.. That seems like one huge tube for 5+ ft^3
April 28, 201114 yr I think running an 18" Nightshade will automatically make you a little different when compared to most folks.
April 28, 201114 yr Author Ive only seen them used in HT systems or fairly small car systems.. That seems like one huge tube for 5+ ft^3Using a volume calculator, it comes to 24" x 24" if the tube is 1/2" thick. I will be making a floor in the back. So there should be enough room.Oh by the way, I thought about making it dual round ports on the side so it looks like a ROCKET!I think running an 18" Nightshade will automatically make you a little different when compared to most folks.That may very well be true! "chuckle"
April 29, 201114 yr Author I look at it this way. Think of it as a garbage can, when you crawl inside and push on it, you get an eliptical effect on the can. but thats only 2 poimts of pressure. well a subwoofer has infinite amounts of pressure points (pushes evenly on all sides), so when a sub hits you get a equal pressurization along all points. If I put a circle brace in the center with steel rods in the form of a triangle atound the inside dia., I feel that a .5 inch wall thickness will be sufficient.
April 29, 201114 yr i can special order them but they must be ordered in 12ft sections.Contact a company near you that deals solely with concrete.My local vendor carries them up to 36" diameter.
April 29, 201114 yr I've done several tube setups over the years. All worked out very well, besides the fact that the tube usually has to be a fair amount larger/longer than any conventional enclosure, though none of them were done with an 18. Looking forward to the log on this, it will be quite unique, and a challange. Good Luck!
April 29, 201114 yr Author i can special order them but they must be ordered in 12ft sections.Contact a company near you that deals solely with concrete.My local vendor carries them up to 36" diameter.Thanks alot shizzzon, I'll see what I can find. could you possible give me a ballpark on what a 12 footer 24 inch dia. would cost?
April 30, 201114 yr I have some experience in them. My first "system" was an 8" in pvc pipe lol.They seem to work best with the port on the sub baffle vs putting it on the bottom. Getting the circle cut right is very important for sealing. Unless you are like a surgeon with a sabre saw, use a router.If you are using a long length, you may want to add bracing atleast at the mid point. I've seen some of the longer tubes breathe under some high power.
May 3, 201114 yr Menards should have what you need. Or other home improvement store (Lowes, Home Depot).
May 3, 201114 yr The home improvement stores have wimpy ones, i've bought mine at a concrete industrial supply.
May 3, 201114 yr Yea I figured the Home Improvement stuff would be to thin and crappy. 24" od diameter is huge tube for Menards.
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