6
Miscellaneous Installation Notes
A common source of air leaks is the connecting wire for the woofers. Terminal
cups are commonly available and are recommended. They provide an airtight
means for bringing the wire into the enclosure and allow for easy wiring
changes. An alternative is to drill a hole slightly larger than the wire and seal
carefully with silicone sealer. Do not disturb the silicone until it has set up.
Moving the wire before the silicone has set up will usually cause an air leak.
If you carpet the enclosure it is important to either cut the carpet around the
woofer opening. It is hard to get a good seal if you have both the gasket and
carpet between the woofer and the wood.
On a sealed enclosure it is easy to test the seal of the box. Push the cone in all
the way and let it go. If the seal is good, the cone should take at least five sec-
onds to return to the center position. If the cone spring back faster that that
you have a leak somewhere in the enclosure. Sometimes you can hear air escap-
ing around the woofer or at one of the joints in the enclosure. If the box itself
leaks take the woofer out and check the silicone seal all around the inside. If the
air is leaking out around the woofer try adding a flexible sealer like plumber's
putty or rope caulk. Don't use silicone sealers around the woofer.
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