Small size superscoop |
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Dani
New Member Joined: 07 August 2020 Status: Offline Points: 3 |
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Posted: 07 August 2020 at 7:30pm |
Hi, To make this clear, I am totally noob when it comes to building speakers, but I always had the idea in the back of my mind to make one. So I came across this website and I hope you guys can help me out a bit. I want to start off by building a superscoop. I have a 6" driver in good shape, but the plans I have seen, are only for 18" and 21". I want to build a smaller size, so when I screw up, it's not that expensive and I can break it apart to understand which mistakes I made. But my main question is; how can I convert the measurements for a 18" to the right measurements for a 6"? Is it as easy as dividing the measurements by 3 or is this more complex, since we're dealing with acoustics here. And also, is it best to use 18 mm thick plywood, or would you guys recommend less thicker plywood, since it's a smaller size... I hope you guys can help me out. Thanx in advance and cheers! -DaniΓ«l
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dj jammin
Young Croc Joined: 10 April 2010 Location: southampton Status: Offline Points: 770 |
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Im no expert on this topic but its not as simple as just scaling down.. a 6 will not have the same ts parameters etc as a scoop driver.. i think some one said in another thread: make a transmission line box and make it look scoop like.. sounds a reasonable plan.. depends on what you want from it etc
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Reverence Sound system
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valve head777
Old Croc Joined: 27 July 2012 Location: East Sussex Status: Offline Points: 1781 |
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You're one of the best box builders I know Mr.... But, yeah difficult to scale down that far. Ps, yes I want the siren, and barracuda in tear down. I'm out never to return. Bye ππππππππππ
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Freedom of choice, choice of freedom.
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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As a start you have to keep the horn length the same, then you can
decrease the surface areas throughout thew horn path. Surface area of a
driver is a square function, so as a rule of thumb you would dived by
(18/6)^2. A typical 6" has an Sd = 133 cm2, a typical 18" has an Sd =
1100 - 1250 cm2. For the SPL of a 6" I would use 9 mm, 7-ply Baltic birch as a minimum or 15 mm MDF.
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 465 |
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Things can differ a lot with small drivers and small bins. This deserves complete new development. Downsizing existing products will not get you anywhere.
What is even your goal in the first place?
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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Dani
New Member Joined: 07 August 2020 Status: Offline Points: 3 |
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My goal is to make a sub for in my room.
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studio45
Old Croc Joined: 16 October 2007 Location: United Kingdom Status: Offline Points: 3864 |
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Right on, well that's easy - build the THAM6. It's a proper sub, with an interesting principle of operation (tapped horn, look it up) and it's designed for a 6" driver already.
Your driver most likely won't be the recommended one for the design, but in my experience, tapped horns can wrangle surprisingly loud bass out of even the weakest of drivers. |
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Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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Crashpc
Registered User Joined: 26 February 2008 Location: Czech Republic Status: Offline Points: 465 |
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This.... TH can dig a lot from very poor drivers.
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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