This isn't specifically about a subwoofer but it's about bass so I thought this might be the best sub to put it in. I'm nearly done with a two way system I'm building. It uses two 8" woofers in separate enclosures. The woofer on the left works perfectly, outputs bass accurately without distortion. But the one on the right, has this port noise affect? I know bass is omni directional so I'm not sure how accurate I am when I say this, but it sounds like it's coming from the woofer and not from the port, which is why I'm not sure it's port noise. It also seems to be there at all volume levels. When I plug the port though, the noise goes away. So, what's my issue here? Could there be a woofer issue, or is my right port not sealed to the enclosure properly somehow?
Grab a battery (9volt - AA - C - D all work) and tap the speaker wire, the speaker will move one direction and if you flip the polarity the other direction.
If your speaker makes any bad sounds.... it’s blown. The port will not make any difference with this test.
If your speaker makes any bad sounds.... it’s blown. The port will not make any difference with this test.
Maybe try swapping the drive units left and right and seeing if the problem stays in the drive unit or the enclosure.
Rob.
Rob.
Perhaps the woofer is not properly sealed to the cabinet. That sound you describe could be caused by air being squeezed through a gap near the woofer's flange. Using a frequency generator, try identifying the frequency at which the sound is most audible, and then move your hand around the woofer's flange. You may be able to determine where the air is escaping.