I was more interested in the audible(quantitive) values if we can notice a difference in ouput(i'm not talking about sound quality)that means there should be nearly a 3db change. The termlab is more than sensitive enough to measure that difference. It would also be able to measure if there is more output(volume not sound quality)how much more volume or less and at what frequency. You would also need a test tone CD. The experiment would have to have very strict controls as temperature,placement,voice coil temp all effect the readings. For example my sub is almost 1 db louder when it's cold out side(like now) then when it's 30C outside(139.3hot-140.1 cooler). I still can get to one if I had to but then I'd have to buy polyfill,remove my sub,put it back in, drive to ajax repeat. I was just kind of hopeing some one else would do it!

 

In my opinion, properly stuffing a box is very important for SQ. Most likely you could more easily here the difference between an unstuffed box and a stuffed box than you could hear the difference of changing head units of similiar price or by switching amps of similiar power and price.

Now you have to use the proper amount of stuffing to optomise the interaction between the subwoofer and the enclosure.

Another use for "stuffing" is to trick your sub into thinking it is in a larger box than it really is. Your sub woofer can "see" up to a 30% larger internal box volume, when stuffed properly, than the actual physical internal box volume. This is nice option when you just don't have the space to build your box large enough, or you want to save some space.

By the way, the Black Hole Stuff is great!

 

So how do you use the proper amount of stuffing ?

And what would be a link to the black hole stuff?

 

If you are doing it yourself, it will be trial and error. Usually start with a loose stuff filling about 1/3 of the internal volume and have a listen, try a bit more and listen again. etc.

If a dealer is installing the sub and box, and it is products they are familiar with, they will have done the trial and error work and will know how much to use.

send me your e-mail addy and I'll send you some info on the 'Stuff'

Kevin