Looking to add some polyfill in the overhead speaker bar and front speakers. Is there a specific type of Polyfill to use or just any Polyester fiberfill sold at Walmart and such. Also, how much do you think I need to do all 4 speakers? I see these sold in bags of 1 Lb and 5 Lbs.

 

You can use any kind, walmart sells it but ive read on here of a guy
that bought like a sound deadner from home depot that looks and does
the same thing that dynomat does for way way cheaper and works
just as good ill try to find the post and post it on here

 

Thank you I appreciate the effort.

 

What does adding polyfill do?

 

It tricks the speaker into thinking it has a larger cabinet behind it - produced enhanced bass. Also has as benefit that (sometimes) it reduces rattles.

 

When I changed my speakers I put a layer of ballistic ( a thicker competitor to dynamat) in the sound bar and pods in the dash. I just used Walmart polyfill, and there was a huge difference.

I'm adding my new Hu, amps, sub this weekend, so I felt a huge difference in bass off the OE Head unit.

 

OK, got the Polyfill from Walmart, it was cheap $8.79 a large bag. Now the question is how much do I pack in the boxes? Should I compact it or leave it fluffy and lightly filled?