Why Use Polyfill In a Subwoofer Box?
If you are looking for more deeper low bass output from the existing enclosure your car subwoofer is placed inside, adding polyfill into a car subwoofer box can make a big difference. Basically, Polyfill is white fluffy stuffing that is placed inside the box, to make the speaker think that its placed in a bigger box as it increases the internal cubic volume. The more damping material you add, the more the bass will get deeper, but also overstuffing can have a negative effect on sound quality. Now in terms of where to buy polyfill from, you can get it from your local DIY store or even extract it from some new or used pillows.
How Much Polyfill Do I Need?
How much polyfill do you need to place in your enclosure is generally is around 1 pound (16 OZ) of cotton stuffing per cubic foot. Polyfill can be used for both ported and sealed boxes. But there is no right or wrong answer, as everybody likes a different sound preference so its best to experiment with different amounts to see which gives you the best results.
How To Add Polyfill Cotton Stuffing Into Subwoofer Box?
4) Reconnect the speaker wires and place the subwoofer back into the box.
1) Unscrew the screws holding the subwoofer into the box. Lift the sub out and disconnect the speaker wires fitted into the terminals.
2) Once you have done that, you will have full access to the internals of the speaker box.
3) Insert your Polyfill stuffing following the rule of fitting 1 pound per cubic foot. Place it flat around the insides of the box and give it a pat down to make it sit.
4) Reconnect the speaker wires and place the subwoofer back into the box.
5) Connect it to your car amplifier and play a song to see if you like the improvment of the bass. If you want to improve the bass further, then keep adding more Polyfill stuffing until you have your desired sound its that simple.
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