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Polyfill! does it realy work?
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<blockquote data-quote="THUMPPER" data-source="post: 5185916" data-attributes="member: 555890"><p>The first thing that comes to mind with Polyfill is to add</p><p></p><p>it to an enclosure and TRICK the woofer into thinking</p><p></p><p>it is in a larger enclosure...</p><p></p><p>first of all a Sub Woofer is NON LIVING...it does not think</p><p></p><p>it is in a larger enclosure when polyfill is added..</p><p></p><p>I have experimented with Pollyfill in all sorts of enclosures</p><p></p><p>and these are my findings</p><p></p><p>Polyfill does 3 things</p><p></p><p>#1..</p><p></p><p>Polyfill dampens the echoing sound waves inside the enclosure...</p><p></p><p>a thin layer on the walls of an enclosure will reduce the amount</p><p></p><p>of soundwaves rebounding off of the inner enclosure walls and</p><p></p><p>it also reduces the amount of soundwaves rebounding off of the</p><p></p><p>back of the woofer cone...</p><p></p><p>in a perfectly square enclosure it will</p><p></p><p>reduce the amount of standing waves...</p><p></p><p>used correctly it will deaden the sound between the notes</p><p></p><p>creating a smoother sound from the front of the cone</p><p></p><p>#2...</p><p></p><p>Polyfill eats up inner volume...if your enclosure is too small and</p><p></p><p>you add a pound of pollyfill you will reduce the inner cf3 of the</p><p></p><p>enclosure and the output and low end extension will decrease</p><p></p><p>doing the exact opositte of the desired effect</p><p></p><p>#3...</p><p></p><p>Polyfill traps heat...it works like insullation</p><p></p><p>in high power systems adding polyfill will</p><p></p><p>increase the inner temperature of the enclosure..</p><p></p><p>this is not good for those who like to pound their subs</p><p></p><p>hard for long periods of time</p><p></p><p>I have read articles by Richard Clark in Autosound Magazine</p><p></p><p>regarding on pollyfill and his comments were there was little</p><p></p><p>or no audiable difference by using pollyfill in an enclosure</p><p></p><p>this subject is highly controversial and is surrounded by</p><p></p><p>many different opinions</p><p></p><p>these opinions are my own...done with several different types</p><p></p><p>of enclosures and woofers....</p><p></p><p>there is no substitution for a properly made enclosure....</p></blockquote><p></p>
[QUOTE="THUMPPER, post: 5185916, member: 555890"] The first thing that comes to mind with Polyfill is to add it to an enclosure and TRICK the woofer into thinking it is in a larger enclosure... first of all a Sub Woofer is NON LIVING...it does not think it is in a larger enclosure when polyfill is added.. I have experimented with Pollyfill in all sorts of enclosures and these are my findings Polyfill does 3 things #1.. Polyfill dampens the echoing sound waves inside the enclosure... a thin layer on the walls of an enclosure will reduce the amount of soundwaves rebounding off of the inner enclosure walls and it also reduces the amount of soundwaves rebounding off of the back of the woofer cone... in a perfectly square enclosure it will reduce the amount of standing waves... used correctly it will deaden the sound between the notes creating a smoother sound from the front of the cone #2... Polyfill eats up inner volume...if your enclosure is too small and you add a pound of pollyfill you will reduce the inner cf3 of the enclosure and the output and low end extension will decrease doing the exact opositte of the desired effect #3... Polyfill traps heat...it works like insullation in high power systems adding polyfill will increase the inner temperature of the enclosure.. this is not good for those who like to pound their subs hard for long periods of time I have read articles by Richard Clark in Autosound Magazine regarding on pollyfill and his comments were there was little or no audiable difference by using pollyfill in an enclosure this subject is highly controversial and is surrounded by many different opinions these opinions are my own...done with several different types of enclosures and woofers.... there is no substitution for a properly made enclosure.... [/QUOTE]
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Polyfill! does it realy work?
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