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Old 24th September 2015, 01:46 AM   #1
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Join Date: Sep 2015
Default UM18-22

Does anyone have experience with this sub? I'm going to be using it in the ~4.0 ft3 box sold by parts express. Is it acceptable for an upfiring configuration?

I've seen lots of numbers about box volume for a Q .707 and many of them are very different. It would be awesome to hear from someone on these forums. Given that the box volume is 4 ft3 minus the internal bracing and driver I was thinking a little over the most commonly recommended 2 pounds of poly fill was in order. It would be awesome if someone could run it through a good sim or formula that they know is reliable.

The more information i have the better.

Last edited by OpenglCG; 24th September 2015 at 06:28 AM.
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Old 25th September 2015, 12:39 AM   #2
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Join Date: Feb 2006
Location: Cascais
Hi OpenglCG,
Qtc = 0.93 is very fine.
Another example in a 4ft2 cubic, Qtc = 0.91.
Dayton Audio UM18-22 v2015 pdf @PE Kit
Have fun.
temperature 20 C
altitude 50m
humidity 40%
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File Type: gif DAYTON UM18-22 v2015, VB = 113.0 L sealed.gif (100.4 KB, 26 views)

Last edited by Inductor; 25th September 2015 at 12:59 AM.
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