What affect does an oversized box have?

[k.bean 10+ year member]

I have a sealed enclosure I got from a buddy that I'm going to use for my 12"s. The thing is, each chamber has about 1.2cubes when the subs recommended sealed volume is 1cube. Will this be a big deal? The enclosure also has all sides lined with 1" of poly fill. The manufacturer recommends this in the manual, but I'm thinking since the box is a little large to begin with I might want to take it out? But I've also read that the poly fill makes a more natural bass sound, and that seems kind of appealing to me. Let me know your thoughts on this, thanks!

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[CBFryman2 5,000+ posts]

I doubt you will notice a difference.

If it is too big it begins to act like an IB subwoofer.

 

[acold7dusta 10+ year member]

naw for sealed box, little deviation will have little to no affect on sound.

 

[j3bus2k3 5,000+ posts]

After your sub displacement, that 1.2 will be **** near 1.0ft^3. Leave the polyfill, it wont hurt it. Typically oversized sealed boxes extend the lower end and increase the effiecency (sp?) so you dont have to use as much power...

 

[k.bean 10+ year member]

Awesome thanks alot guys.

 

[PV Audio 5,000+ posts]

Yes, but as said before, if you make it TOO large, then the speaker will behave like it's in an infinite baffle install.