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Sonotube Design Help Needed

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Huck2me View Drop Down
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Joined: 08 February 2017
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    Posted: 08 February 2017 at 4:51pm
I have ordered a FiAudio BL Series – BL18v3 Woofer which I plan to build a sonotube sub for use outside (covered) pool deck. I will be powering it with a Behringer NU3000DSP.
From the SonosubV2.03 calculator using a 24" diameter sonotube I am getting 27 3/8" height, 3" diameter port 1 1/4" long. This does not seem correct. The BL18v3 Woofer specs are as follows.
FS 33.6 Hz
RE 0.7 | 1.4
QMS 8.21
QES 0.42
QTS 0.40
MMS 338g
CMS 0.699
SD 1210cm^2
VAS 136.0 l
SPL 92.8 l
BL 15.5 N/A | 21.9 N/A
XMAX 20mm (One Way)
Overall Diameter 18.500”
Cutout Diameter 16.750”
Mounting Depth 9.750”
Driver Displacement 0.26cuft
Ported Box 5-8 cuft

If anyone could run these numbers for a 24" diameter sonotube. Thanks in advance.
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_djk_ View Drop Down
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Joined: 23 November 2004
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2017 at 9:50pm
The size seems right, but the port is too small for the x-max.

I would not face the driver straight down because the cone will eventually sag.


djk
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