Fiberglass stuffing?

[Electrodynamic]

I thought I'd stirr the kool aid and ask if anyone lines the inside walls of their subwoofer enclosures? If so, why?

I have in the past but I don't anymore.

Discuss...

[M-Special]

I've used stuffing sometimes, and sometimes not. I've honestly never noticed any audible difference. From what I've read stuffing is supposed to make the driver think its in a bigger box? Or something like that.... Anyways like I said, no audible difference in my experience. If you build your box the right size to begin with, stuffing it isn't really necessary. I guess there could be other reasons for stuffing that I am unaware of, I would love to hear about it.

[hoss]

i effing hate fiberglass insulation...

[Electrodynamic]

For subwoofer applications there have been reports of minor smoothing of the response curve, but I have never heard an audible difference.

If you stuff the enclosure with fiberglass (not just lining the walls) it can have an effect similar to polyfill. But polyfill doesn't itch, it stays in one place without glue, and it has less tendency to get inside the motor, and it does a better job at fooling the woofer into thinking it's in a bigger enclosure.

[Megalomaniac]

Originally Posted by Electrodynamic

For subwoofer applications there have been reports of minor smoothing of the response curve, but I have never heard an audible difference.

If you stuff the enclosure with fiberglass (not just lining the walls) it can have an effect similar to polyfill. But polyfill doesn't itch, it stays in one place without glue, and it has less tendency to get inside the motor, and it does a better job at fooling the woofer into thinking it's in a bigger enclosure.

yes, honestly I can tell the dif with stuffing, and I like it! It feels & sounds warmer IMO. The response curve is smoothed out a ton. and when you look at the sub playing it looks like its playing natural and is not fighting back and being confused(more or less cause of standing waves).


Its all thermodynamics. Whether you use polyfil or glass it will change density of the air in the enclosure when the sub is playing. What happens is when the sub is playing instead just pushing air back and forth, its now doing it but now the stuffing is vibrating inside which is causing some friction and generates Heat, when heat is generated the density changes in the air. Therefore gives the driver the illusion that its in a bigger box. Its also the reason why a speaker plays differently during the day than the night, or during the winter than the summer...no filling either!.

[Electrodynamic]

Stuffing yes, but lining the walls with light fiberglass, no.

Lining the walls with heavy fiberglass insulation can make an impact with subwoofers - as it's acting more like polyfill than an acoustical smoothing agent. But I prefer polyfill because it's less messy and doesn't itch.

[Megalomaniac]

Well I think they say line the walls with glass insulation because you dont want to use too much. the glass is more dense than the polyfil. so it will need less to achieve the same results. just spray the glass with heavy hold hairspray, you wont be soo itchy then