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Old 1st April 2004, 12:21 AM   #11
Speakerholic
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Quote:
Originally posted by Timn8ter
(btw, it's damping not dampening, "to dampen" would be to get it wet )
damp·en __ (_P_)__Pronunciation Key__(dmpn)
v. damp·ened, damp·en·ing, damp·ens
v. tr.
1. To make damp.
2. To deaden, restrain, or depress: “trade moves... aimed at dampening protectionist pressures in Congress” (Christian Science Monitor).
3. To soundproof.

damp __ (_P_)__Pronunciation Key__(dmp)
adj. damp·er, damp·est

1. Slightly wet. See Synonyms at wet.
2. Archaic. Dejected.
n.
1. Moisture in the air; humidity.
2. Foul or poisonous gas that sometimes pollutes the air in coal mines.
3. Lowness of spirits; depression.
4. A restraint or check; a discouragement.

Who knew? These were entered as "dampening" and "damping". Notice how damping doesn't even show up as an option?

I was with you Tim.
This comes straight from Google

Anyhoo,
I think the best thing is to "Trial and error it" with the batting. Or is it battening?

Cal
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Old 1st April 2004, 12:33 AM   #12
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Quote:
Or is it battening?
It could be, like batten down the panels.

Aye matey, arrr.....
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Old 1st April 2004, 02:02 AM   #13
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Sorry if this is a dumb question, but other than trying to preserse space, whats the point of virtually increaseing the volume of the enclosure? I suppose, if you decide you made the box too small, then I could see it...sorry I am rambling.
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Old 1st April 2004, 02:22 AM   #14
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Yes it has the same effect on the driver as a bigger enclosure would but without the resonances associated with a larger box. The benefits of using poly-fil in subs is debatable and most experienced builders will say to just line the sides with batting (battening to you Cal).
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Old 1st April 2004, 03:13 AM   #15
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After batting down the hatches for the night a thought came to me. If you're not using test equipment, my thoughts are that you are likely to hear a slightly deeper but perhaps more subtle bass, the more stuffing you add.

Calamaniac
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Old 1st April 2004, 03:58 AM   #16
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To a point. If you overdo it you actually reduce bass response.

Isn't this wonderful?

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Old 1st April 2004, 04:21 AM   #17
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Any real difference between lining (as apposed to stuffing) a sub with batting and lining the sub with "egg crate" foam then?

Do I understand correctly that the result of both would be to attenuate any higher frequencies or harmonics but would not really affect the sub behavior from 80Hz down?
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Old 1st April 2004, 04:16 PM   #18
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That seems correct. Any effect to the apparent volume of the enclosure would be minimal.
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Old 1st April 2004, 04:45 PM   #19
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Is there a "rule of thumb" as to how much effect stuffing has on increasing the "apparent volume" that the driver thinks is there?


Looks like the effect of stuffing could be interesting for a box that was high Q (relatively small box for a particular driver) to begin with, but not for a low q design.

On a sub box that is already low q, stuffing does not look like it would have much effect. For example a look at a particular .54 Q sub design with F at about 48 only gets a 1 dB increase at 30 if the perceived box size is made twice as big.
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Old 1st April 2004, 04:50 PM   #20
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Here is an interesting link that may prove helpful on the subject of stuffing to manipulate Q:

Polyester Fiberfill Effects on Box Q
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