Sub Vibration Noise Problem

hernanstafe · 18th March 2007, 10:08 PM

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.

18th March 2007, 10:08 PM	#1
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	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 doi tried holding the cabinet firmly with a friend but it still vibrates. Any ideas?

19th March 2007, 12:14 AM	#10
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	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. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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18th March 2007, 10:59 PM	#2
Volenti diyAudio Member Join Date: Aug 2003 Location: Australia	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.

18th March 2007, 11:14 PM	#3
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	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

18th March 2007, 11:16 PM	#4
audiobahnkid592 diyAudio Member Join Date: Mar 2007	Try putting a gasket behind the sub it self. In between the wood and sub can vibrate when it is playing.

18th March 2007, 11:19 PM	#5
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	it has a gasket, the speaker border is covered with a rubber gasket that goes between the wook mount and the speaker itself.

18th March 2007, 11:28 PM	#6
audiobahnkid592 diyAudio Member Join Date: Mar 2007	Is the speaker itself possibly damaged?

18th March 2007, 11:38 PM	#7
MJL21193 Account disabled at member's request Join Date: Mar 2007	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.

18th March 2007, 11:44 PM	#8
hernanstafe diyAudio Member Join Date: Feb 2007 Location: Argentina	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

19th March 2007, 12:04 AM	#9
MJL21193 Account disabled at member's request Join Date: Mar 2007	Is the connector plate rattling against the box? Is there a gasket behind it? It doesn't take much.

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