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Free Plan: 21" 30hz Ported Sub

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vertx View Drop Down
Young Croc
Young Croc
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Joined: 14 March 2012
Location: Sydney
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Post Options Post Options   Thanks (1) Thanks(1)   Quote vertx Quote  Post ReplyReply Direct Link To This Post Topic: Free Plan: 21" 30hz Ported Sub
    Posted: 03 April 2018 at 12:03am
I imagine this would do well under a good 15", crossover in the 60hz region.

** Everything below is theoretical and has not been built and measured yet **

Driver: Eighteensound 21LW2500
Enclosure Volume: 267.2 L 
Cabinet Tuning Freq: 31hz

Fusion 360 Public Share Link:

https://a360.co/2Ik9Ffe

^^ This will let you view in 3D, explode, measure, etc all in a web browser window!


Cabinet Processing: 


SPL @ 2500w:



xmax @ 2500w:



Port Velocity @ 2500w:



Port Area:












Edited by vertx - 03 April 2018 at 12:17am
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sgarfa View Drop Down
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Joined: 10 December 2013
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sgarfa Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2018 at 2:21pm
nice project, but especially on  so performing woofers i I prefer to use to big vent ports..  ... even at cost to tuning bit higher...
there are 1x21 "reflex pro subs with over 700cm2 of mouth (not diy)

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