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Acousta-Stuf Polyfill Speaker Cabinet Sound Damping Material 1 lb. Bag
Does acousta-stuf increase the Vas?
I am creating a portable dock and i would like to cut back on the massive size required by the manufacturer. Is using acousta-stuf a way around using the full required Vas? I am using 3 inch tang band full range speakers and they each require .05 cu. ft. which seems to be quite a lot. And if i do use the acousta-stuf can I port the enclosure? Will the acousta-stuff damped the bass output?
Dampening material is not a band aid for making a box too small. It will lower the resonance in the box making it sound quieter than a box with no dampening. That's good so you can hear the music and not the speaker. Once the speaker starts making it's own noises then it can't handle any more power. I usually use poly fill for sealed and cascade foam for vented. My old boss used to put poly fill in panythose and weigh it on the scale. For vented boxes he would leave it in the pantyhose, tie it off, and throw it in. That way it couldn't come out of the ports. We had generic boxes and if a certain sub didn't work or sound good in it he would just keep adding poly fill untill it muffled the peaks out. I never really agreed with that method but it wasn't up to me. .05 ft3 isn't even 4.5" cubed internal dimensions. That doesn't seem too unreasonable for a 3" driver. Vented will be bigger if that was the volume for sealed. If you use thinner material it wouldn't be so bulky. The tube of a 6" port cut 3" long would be around .05 then wrap in cloth and resin maybe. Vas is about cone size and how far it moves. Dampening deals with the sounds the cone makes when it moves. The size of the box being right is more important than making it small and over dampening.
Date published: 2013-06-15
how man cubic inches/feet per 1lb bag, please?
That depends on how much you tease it apart, the concept of volume doesn't really apply. Speakers typically specify damping by weight. One of the kit speakers I had came with four bags of the stuff, each measured out by weight for different compartments.
Date published: 2013-01-25
What is the best way to fluff Acousta-Stuf?
Acousta Stuf comes in a bag and is pretty compacted together. All you have to do is pull apart the fibers as well as you can. Think about how you fluff a pillow.
Date published: 2013-04-17
i have a speaker box
that is 2't x 13.5"w X 15"d and its all sealed its got 2-SELENIUM 6.5" and a SELENIUM -ST 200 supper tweeter in it. should i use this to bring the sound down? if so how many bags?
A good rule of thumb is about a half pound of stuffing per cubic foot of volume in the elcosure. Assuming those are external dimensions, you have around 2.5 cubic feet of total airspace.
Date published: 2013-02-22
What is the denier, fiber type and cross-sectional shape of the fibers?
The cross-sectional area and shape of this is known as 'trifilar', or most like the Mitsubishi logo. This is why it stays put and how you place it as it holds itself well.
Date published: 2013-05-31
What's to keep the fluf out of the back of the speaker?
Nothing. The whole bag of this stuff is pretty much one big clump. You have to rip off chunks and pull and pull to strech it out to a uniform layer. It's not like little hairs will be flying around. Most sealed boxes that I've weighed it out for end up being pretty full. The sub kind of pushes it down in the box. I've never noticed it inside the frame of the sub when taking it out. My old boss used to put it in nylons and tie it off then throw it in the box.
Date published: 2013-04-25