polyfill

I have a box that is slightly under .75 cubic feet. Unfortunately I do not know the exact volume at this time. I know the general polyfill rule states to add 1 pound of polyfill per cubic foot. The manufacturer said that I should add .75 cubic feet of polyfill. If I add 1 pound to my box will this be too much, or will the .25 extra pounds not make any difference?

Thanks for all of your help,

-------------
2005 Honda Accord DX

I don't think it'll really matter...I would advise just doing a loose/medium fill; i.e. don't cram the stuff in there but don't just throw a handful of it in there either...fill the enclosure, but just to the extent that the polyfil is still "fluffy".

here

A read up on polyfill previously discussed on the fourums

-------------
COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

The general rule is .5 pounds per cubic foot.

Even if you DID go to 1 pound per, and you stuffed the whole pound in the existing .75 cubic foot enclosure, you will be overstuffing by 33%, a SIGNIFICANT number. Weight it out carefully, and install the right amount.

There is a curve involved with damping an enclosure, in that there is an effectiveness to the stuffing. There is a peak effectiveness stuffing volume, and beyond this density, your effectiveness drops off rapidly. (See the curve below...) The ONLY way to accurately measure the damping is with an impedance test.



The peak density/effectiveness density will ALSO be different, depending on the beginning system Q, the enclosure volume, and the Fs of the beginning system; there is really no hard and fast "rule".



-------------
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

i started to put it in all my enclosures, an its a noticeable improvement over not having it, the quality of bass seemed alot better in my application

-------------
1000 watts of lp, now need sum hp an mids