Having air leaks inside the subwoofer box can reduce a noticeable
amount of spl and sound quality. When deep low frequency bass hits, you will
hear air rushing out and the lows won’t be refined as such. You will notice air
leaks more a sealed box because the subwoofer purley relies on an air tight
seal. The best way to seal them up is to use either silicon or wood glue. Both
are great materials that can be used to seal up any kinds of air leaks found
inside the edges of the box. Once you have sealed up your box, the best way to
test for any kind of air leaks is to place the subwoofer inside the box. Screw
it in and push the cone downwards listen out for any kind of noises. If the box
is air tight, the cone will simply not move down and will be stiff.
1) Remove the subwoofer from the enclosure.
2) Pour wood glue starting from the edges, squeezing the bottle
and going downwards moving onto the next corner and doing the same.
3) Look for any old screw holes that are from amps being placed
onto the back that you don’t use.
Also place glue around the inside of the terminal cup. Lots
of air can escape from the edges.
4) Allow the glue to dry for at least a minimum of 24 hours before
putting the speaker back in. Its needs to dry fully before you use the sub or it could lead to damage on the soft materials.
5) When putting the subwoofer back into the enclosure, please make sure that each
screw is placed inside the hole around the speaker. Once screw missing or one
being not tighten enough can cause air leaks to persist.
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