diy sub trap

svetdts · Post by **svetdts** » Sun Feb 27, 2011 7:00 pm

Hello, how do I calculate the tuned
core in sub trap like this http://www.asc-home-theater.com/subtrap-flyer.pdf

Post by **gullfo** » Mon Feb 28, 2011 12:27 am

please update your profile with your location. as far as "tuning" it? it looks like they have created some Helmholtz resonator around an inner tube trap. it says it patented technology so presumably you can research the patent number where it explains how it works. you might just consider purchasing one as the fastest way to obtaining one.

svetdts · Post by **svetdts** » Mon Feb 28, 2011 1:59 am

Yes, but I wonder how they can patent Helmholtz Resonator

. I will replace "their" patent with Helmholtz Panel Resonator.

Post by **gullfo** » Mon Feb 28, 2011 3:34 am

just my observation on the cut away... it could be an amplitude grating design

but for accuracy, i suggest reading the patent filing which should explain how it works... a review: http://www.asc-hifi.com/widescreen-subtrap-review.pdf

1985-U.S. Patent Number: 4,548,292
'Reflective Acoustical Damping Device for Rooms' (TubeTrap)
http://www.freepatentsonline.com/pdfb/d ... 548292.pdf

svetdts · Post by **svetdts** » Mon Feb 28, 2011 8:18 pm

thank you, gullfo

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