polyfill?

[JimJ 5,000+ posts]

No real reason to...it's used in transmission lines to simulate a full quarter-wave length.

 

[Volenti 10+ year member]

thank you. so polyfill isn't capable of having a negative effect then correct?

Unfortunatly there is no free lunch, adding fill can reduce the peak of a boxes response by up to 3db (this is generally desireable for SQ), so don't use it if you are after maximum spl.

 

[SwiftCelGTS 10+ year member]

ok i bougth my sub, it's a 12" Kicker Comp VX and it is going in a 1.25 cuf sealed box. the amp i'll be using to power it is a KX600.1 that makes 710W. should i use polyfill with this setup?

 

[Volenti 10+ year member]

I would try it and see how you like the sound, there aren't any hard and fast rules with fill, and it doesn't need to completely fill the enclosure to have an effect, you can just half fill it to get a little damping without loosing too much peak spl.

 

[SwiftCelGTS 10+ year member]

yah i will play around with different amounts until i get it to sound good

 

[ruger 10+ year member]

poly does work with ported designs.