If you want to get more deeper bass you will need the biggest possible box to help make the low frequencies more apparent. This can be easily done by building a new MDF speaker box for your car, however this can become costly and very time consuming if you are planning to build it yourself in your spare time.
You can still make the current box bigger though by using a special filling material called Polyfill. This works because it slows down the bass waves, making the inserted subwoofer or speaker think that it is placed in a bigger box with larger internal cubic feet volume. This brilliant stuff can be purchased from DIY shops that sell loft insulation or infact you can take some pillows apart and use the foam stuffing from them.
You can still make the current box bigger though by using a special filling material called Polyfill. This works because it slows down the bass waves, making the inserted subwoofer or speaker think that it is placed in a bigger box with larger internal cubic feet volume. This brilliant stuff can be purchased from DIY shops that sell loft insulation or infact you can take some pillows apart and use the foam stuffing from them.
You can't really say for sure how much Polyfill you require to fit inside the speaker box to make it seem bigger. You have to play around with adding some in and removing some out to workout what sounds the best for you, until you have gained the desired bass sound you are looking for. Generally adding more stuffing results in deeper bass and gets rid of that peaky boomy one note sound that some bassheads like or hate. This works for both sealed and ported vented types of box designs.
Here is clear instruction on how you can use Polyfill with your speaker box:
The general rule is that you should add one pound of Polyfill stuffing per each cubic foot. So if your single 12 inch subwoofer box has an internal cubic feet volume of 3.0 you will need to add three pounds of stuffing.
1) Get a screwdriver and carefully remove each screw from the metal surround.
2) Lift out the driver and disconnect the speaker wires on the terminals.
3) Add relevant amount of Polyfill stuffing you are wanting to add in.
4) Place the speaker back into the carpeted enclosure box. Test how it sounds play a few bass heavy tracks. Then lift it out and remove or add stuffing to optimise your desired sound.
5) Once you are happy with how the bass sounds, line up the subwoofer, reinsert all the screws back into the holes you removed earlier on and tighten them up using a screwdriver with the relevant head shape.
The general rule is that you should add one pound of Polyfill stuffing per each cubic foot. So if your single 12 inch subwoofer box has an internal cubic feet volume of 3.0 you will need to add three pounds of stuffing.
1) Get a screwdriver and carefully remove each screw from the metal surround.
2) Lift out the driver and disconnect the speaker wires on the terminals.
3) Add relevant amount of Polyfill stuffing you are wanting to add in.
4) Place the speaker back into the carpeted enclosure box. Test how it sounds play a few bass heavy tracks. Then lift it out and remove or add stuffing to optimise your desired sound.
5) Once you are happy with how the bass sounds, line up the subwoofer, reinsert all the screws back into the holes you removed earlier on and tighten them up using a screwdriver with the relevant head shape.
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