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-   -   Sub Vibration Noise Problem (http://www.diyaudio.com/forums/subwoofers/98392-sub-vibration-noise-problem.html)

hernanstafe 18th March 2007 10:08 PM

Sub Vibration Noise Problem
 
I've recently built a vented sub 10" cabinet, and when i put the vent tubes in i hear a horrible noise like the wood vibrating. The box is really strong i put a lot of screws in it so it didn't vibrate but something still does vibrate, the vent tubes are not the problem. I was wondering if it's needed to cover the inside of the cabinet with some noise suspension material or it's not needed, i really don't know what to do:(i tried holding the cabinet firmly with a friend but it still vibrates. Any ideas?

Volenti 18th March 2007 10:59 PM

How is the driver attached to the enclosure? did you use a gasket of some sort? There is a lot of pressure in the enclosure especially at the tuning frequency and this can make the sub move on it\'s mounts even if it seems solid by feel, same goes for the port.

hernanstafe 18th March 2007 11:14 PM

the speaker is mounted using 8 screws with nuts, it looks and feels strong. The box has lots, and i mean LOTS of screws everywere. About the vents, when i put a tube in the vent, holding it with my hand not touching the enclosure, you can still hear the vibration noise, even when i put no tubes at all you can hear a slight vibration noise i assume coming from the inside. There are no loose parts inside at all.

Oh, the speaker comes with a rubber gasket!! so i don\'t think that\'s it

audiobahnkid592 18th March 2007 11:16 PM

Try putting a gasket behind the sub it self. In between the wood and sub can vibrate when it is playing.

hernanstafe 18th March 2007 11:19 PM

it has a gasket, the speaker border is covered with a rubber gasket that goes between the wook mount and the speaker itself.

audiobahnkid592 18th March 2007 11:28 PM

Is the speaker itself possibly damaged?

MJL21193 18th March 2007 11:38 PM

Hi. What kind of wood is it made from? Cheap plywood can have voids inside with loose material that buzz and drive you crazy. MDF is the best bet for subs.
Also are your vents large enough? High speed air can produce a sound as it goes though the port.

hernanstafe 18th March 2007 11:44 PM

the speaker is not damaged, when it\'s off the box it sounds just fine. The vent size...well that might be a problem. When i take the connectors on the back of the cabinet off there a 2.5" whole, the sound changed dramatically but the vibration seems to dissappear. Like i said, the sounds changed and it\'s not so good. I can show you the cabinet plans, and pictures if you guys want

MJL21193 19th March 2007 12:04 AM

Is the connector plate rattling against the box? Is there a gasket behind it? It doesn\'t take much.

richie00boy 19th March 2007 12:14 AM

How much is the driver moving? Sounds like either the driver may not like moving so much, or you have a too-small vent diameter.


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