BigAir
Ex Member
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[quote author=jj420 link=1129433749/0#9 date=1130422193]"lining" (attaching a layer uniformly to the walls) slows down airspeeds, this makes a nicer sound
"Stuffing" (filling a cavity with light fiberfill) dissipates pressure more efficiently than just air, and you need between 2 and 3lbs per cubic foot to make a difference. above 3lbs per cube though, diminishing returns, theres not too much more to be had.
lining deals with resonances, standing waves, airspeed etc
stuffing deals with only one thing, dissipation of the backwave. the purpose of a box is to contain the backwave off the cone, in order to do that, you need a certain volume of air to dampen it. air with thousands of tiny light fibers to move mixed in dampens energy a lot faster and more efficiently, creating the illusion of a bigger box.
so, stuff your chambers, and line your throats (i know, i know, that sounds bad, get your mind out of the gutter) [/quote]
That's not always the case. Stuffing will change the tuning of any enclosure whether it's sealed, vented, a horn or transmission line. Transmission lines enclosures are very sensitive to any kind of stuffing. It's because of the air speed that you spoke of. If you have an enclosure that is perfectly tuned, you will throw it off by adding stuffing and make it sound worse. I'm pretty sure that if you add stuffing to the compression chamber and/or the throat of a WO, you will lower the tuning substantially. Not that there's anything wrong with that. It's just going to sound different and probably lose a little output. Depends on your drivers and environment.
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