I have measured a difference with and without stuffing in a DIY sealed sub. The difference was some unwanted resonances were attenuated with the stuffing. It probably changed the response a little as well but I didn't pay attention to that as subs get a lot of EQ and any reponse changes were very small.
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DIY Subwoofers
- Thread starter damailman_79
- Start date
i also found something meaningful on this topic https://glasswolf.net/papers/polyfill
The measurements show changes in resonance frequency and the calculated increase in effective enclosure volume due to stuffing.
I already EQ my subs, but it might still be worth experimenting with stuffing, since the effective volume increase shown in those measurements looks quite promising.
The measurements show changes in resonance frequency and the calculated increase in effective enclosure volume due to stuffing.
I already EQ my subs, but it might still be worth experimenting with stuffing, since the effective volume increase shown in those measurements looks quite promising.
As long as the internal dimensions of your cabinet are small enough that all resonances are far outside of the bandwidth of your sub internal dampening is not NEEDED.
But having less resonances even outside of the bandwidth is not a bad thing and filter slopes are no hard cut - so I prefer dampening.
Dampening also increases losses of the speaker and lowers Q of the cabinet. With a LOT of dampening this could potentially influence the sound. I normally fill the volume with not too dense sheep wool and never could detect a negative effect of it, you would probably need a lot of dense dampening to make that audible.
But having less resonances even outside of the bandwidth is not a bad thing and filter slopes are no hard cut - so I prefer dampening.
Dampening also increases losses of the speaker and lowers Q of the cabinet. With a LOT of dampening this could potentially influence the sound. I normally fill the volume with not too dense sheep wool and never could detect a negative effect of it, you would probably need a lot of dense dampening to make that audible.
