Reply to thread

Message

<blockquote data-quote="Immacomputer" data-source="post: 6217315" data-attributes="member: 570419">Home audio users use polyfil in their enclosures to reduce peaks around resonance (port tuning) and to smooth out upper frequency response. You shouldn&#039;t just pack it in a ported box all random because it will really kill the main function of the port. Most home audio ported enclosures just have polyfil lining the walls. Polyfil doesn&#039;t have the same spring loading properties that air has and so the enclosure can&#039;t really drive the port.Polyfil doesn&#039;t really &quot;make the box seem bigger&quot; but rather just lowers the total damping of the system. It also doesn&#039;t &quot;slow the sound wave down&quot; either. I agree with Violenti in that the thermal effects are very minuscule.Also, adding polyfil INTO the port is a terrible idea. That will change the port tuning drastically but not at all because of it making it appear bigger. It will load down the port with a much larger mass and drop the tuning significantly as your tuning frequency is based on the mass of the resonator (usually air or passive radiator).</blockquote>

[QUOTE="Immacomputer, post: 6217315, member: 570419"] Home audio users use polyfil in their enclosures to reduce peaks around resonance (port tuning) and to smooth out upper frequency response. You shouldn't just pack it in a ported box all random because it will really kill the main function of the port. Most home audio ported enclosures just have polyfil lining the walls. Polyfil doesn't have the same spring loading properties that air has and so the enclosure can't really drive the port. Polyfil doesn't really "make the box seem bigger" but rather just lowers the total damping of the system. It also doesn't "slow the sound wave down" either. I agree with Violenti in that the thermal effects are very minuscule. Also, adding polyfil INTO the port is a terrible idea. That will change the port tuning drastically but not at all because of it making it appear bigger. It will load down the port with a much larger mass and drop the tuning significantly as your tuning frequency is based on the mass of the resonator (usually air or passive radiator). [/QUOTE]

Verification