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Not sure of term but I notice some distortion/vibration coming out the speaker port?

First off...I know that you don’t listen to speakers this way! 😜

However when listening to my speakers at a decent level if I go the the back of them in one speaker coming out of the port I hear a little vibrations/distortion sound?

I cannot hear this when listening at my MLP but wanted to see what you guys though. 
Does it sound like my speakers bolts need tightening?
So I need more wadding?

Am I listening to loud?

todd1010
twoleftears's avatar
twoleftears
5,318 posts
 

Is it port chuffing

https://forums.audioholics.com/forums/threads/chuffing-what-is-it-and-what-causes-it.20935/

or is it material/mechanical from the enclosure?

noromance's avatar
noromance
9,769 posts
 
Download a frequency generator app on your phone and do a sweep through the frequencies listening for specific resonances. 
jetter
3,033 posts
 
Check that the glue holding the plastic insert port piece to the speaker has not dried out and the plastic piece is not vibrating against the port hole of the speaker.
audiokinesis
2,737 posts
 
If it’s a mechanical noise, it could many things but one of them is unsecured wires vibrating from the air movement due to the port.

If it’s a "flutter" then it could be either chuffing or an air leak. I once had a small air leak underneath the flange of a port and it sounded almost like the wingbeats of a huge insect.

Duke


todd1010 OP
74 posts
 
I’ll give it a closer listen this evening. My first impression of it was that it’s the drivers working hard. 
They are 3 way bookshelf speakers (Phase Technology PC 3.5).
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