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Old 9th January 2011, 11:00 AM   #31
Boscoe is offline Boscoe  United Kingdom
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Originally Posted by epa View Post
good job
how many r u going to bild?

oftopic/kan someone take a look here ,i used the same approximation as tb46 suggested for the cubo.
Thanks I'm going to build one more, one for each side.
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Old 9th January 2011, 07:53 PM   #32
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This can be sigificant when the driver is placed in a narrow part of the horn, but is probably not a problem in Cubo where the driver is placed in either the "back chamber" or the "horn mouth", both of which are generously sized. To try it, work out the profile area (side view) of your chosen driver, then subtract it from either S2 or S4 as appropriate.
I add 200 cm^2 (to 1500 cm^2) for the magnet inside the chamber, and take 200 cm^2 off (1500 cm^2) for the magnet inside the horn/port. This equals to 8 liters of difference in volume for the Vtc.

With the magnet inside the chamber for maximum output or with the magnet inside the horn for lowest extension respectively.

@Boscoe: Glad you like the result. Any plans for the finsih?

Best regards johan
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Old 9th January 2011, 08:25 PM   #33
Boscoe is offline Boscoe  United Kingdom
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I add 200 cm^2 (to 1500 cm^2) for the magnet inside the chamber, and take 200 cm^2 off (1500 cm^2) for the magnet inside the horn/port. This equals to 8 liters of difference in volume for the Vtc.

With the magnet inside the chamber for maximum output or with the magnet inside the horn for lowest extension respectively.

@Boscoe: Glad you like the result. Any plans for the finsih?

Best regards johan
Yes I would like to do a thick resistant matt black coating but don't really know how to go about it!
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Old 9th January 2011, 09:22 PM   #34
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Can you get hold of Warnex? Two to three layers with a textured roller should do it. Oh, and if you haven't done it already, rounding the corners off with a rounding bit (radius 6 -9 mm/ 1/4"-3/8").

Best regards Johan
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Old 9th January 2011, 09:28 PM   #35
Boscoe is offline Boscoe  United Kingdom
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Originally Posted by Rademakers View Post
Can you get hold of Warnex? Two to three layers with a textured roller should do it. Oh, and if you haven't done it already, rounding the corners off with a rounding bit (radius 6 -9 mm/ 1/4"-3/8").

Best regards Johan
Okay thanks and yep I will be rounding off the corners.
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Old 10th January 2011, 02:30 PM   #36
NEO Dan is offline NEO Dan  United States
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What is that big sticker on the woofer for???
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Old 10th January 2011, 06:39 PM   #37
Boscoe is offline Boscoe  United Kingdom
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It's just a check from the shop that i brought it from to say it works.
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Old 13th August 2011, 09:01 AM   #38
Boscoe is offline Boscoe  United Kingdom
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Sorry to resurrect an old post but just wondering what makes a cubo not just a tapped horn?
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Old 13th August 2011, 09:13 AM   #39
epa is offline epa  Netherlands
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i have not digged in to it,but i would say' nothing'.
do you have a speaker in mind?
i could try moddeling it for u.
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Old 13th August 2011, 02:11 PM   #40
Xoc1 is offline Xoc1  United Kingdom
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The difference between the Cubo design and a conventional TH is comparable to the difference between a conventional front loaded horn, and a bandpass horn.
The bandpass horn and the cubo have a compression chamber that allows a lower frequency response with a shorter horn path length.
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