Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Enclosure Design & Construction
Question about volume
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Buck" data-source="post: 8759139" data-attributes="member: 591582"><p>Polyfill is something that I've seen as an attempt to make a box seem bigger. If you can, I always suggest getting proper airspace with a proper enclosure; I understand that's not always doable.</p><p></p><p>Other than that, polyfill is used in things like midrange towers, where they are ported. The polyfill helps keep midrange reverberations from coming out of the port, because the polyfill absorbs or dampens the sharpness of higher frequencies, so that only bass/midbass frequencies come out, so it doesn't mess up your angles/staging of the midrange bandwidths. My 42" Klipsche towers have polyfill done this way, for example. They sound really good. Play down to 40-45 hz, and play up past 20 KHz, and have 2 backwards firing ports. The polyfill is layered on the inner walls, on every wall, so that the midrange bandwidth doesn't come out of the port and reverberate off the house walls- only the bass does, because it's more like omnidirectional pressure and not angular like higher frequencies are. I imagine if people have ported midranges in car doors or in home-like setups that using polyfill in those would really help not have unbalanced midrange sounds coming out of the port, at weird angles and weird peaks.</p></blockquote><p></p>
[QUOTE="Buck, post: 8759139, member: 591582"] Polyfill is something that I've seen as an attempt to make a box seem bigger. If you can, I always suggest getting proper airspace with a proper enclosure; I understand that's not always doable. Other than that, polyfill is used in things like midrange towers, where they are ported. The polyfill helps keep midrange reverberations from coming out of the port, because the polyfill absorbs or dampens the sharpness of higher frequencies, so that only bass/midbass frequencies come out, so it doesn't mess up your angles/staging of the midrange bandwidths. My 42" Klipsche towers have polyfill done this way, for example. They sound really good. Play down to 40-45 hz, and play up past 20 KHz, and have 2 backwards firing ports. The polyfill is layered on the inner walls, on every wall, so that the midrange bandwidth doesn't come out of the port and reverberate off the house walls- only the bass does, because it's more like omnidirectional pressure and not angular like higher frequencies are. I imagine if people have ported midranges in car doors or in home-like setups that using polyfill in those would really help not have unbalanced midrange sounds coming out of the port, at weird angles and weird peaks. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
Question about volume
Top
Menu
Home
Refresh