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Scraping sound when push on speaker lightly
#363137 01/09/12 11:55 AM
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Deano Offline OP
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G'day there,

I was playing some Frequency sweeps on the weekend and when it got down to 15 - 5hz 1 of the M80 woofers made a ticking sound when moving in and out confused. Just wondering what that could be and if there's a problem with the speaker? So on that note i checked the other M80 and VP180 by pushing the cone lightly and found that a couple mid range speakers made a scraping type sound eek and wondering also what that could be and if there's something wrong with the speaker. With them making that sound will that do damage to the speaker because i cant hear it from my seating position but would it effect sound quality? Hope you can help,

Cheers.

Re: Scraping sound when push on speaker lightly
Deano #363151 01/09/12 02:50 PM
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Woofers are pooched. Every single one that is making the scraping sound. They need to be replaced.

Playing test tones at those frequencies you were just asking for trouble.


I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne
Re: Scraping sound when push on speaker lightly
BlueJays1 #363159 01/09/12 05:27 PM
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I would call Axiom.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB SonyUBPX800


Re: Scraping sound when push on speaker lightly
SirQuack #363162 01/09/12 05:41 PM
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As BlueJays1 said, test tones are dangerous; it's the reason people don't listen to them all the time in place of music.

for some :-S people, test tones ARE music, but they must be very cautious and handle it as if it was dynamite.


Last edited by J. B.; 01/09/12 05:44 PM.
Re: Scraping sound when push on speaker lightly
J. B. #363181 01/09/12 09:08 PM
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Did you have the m80's playing full range? That is even lower than an ep500 can play.


-David
Re: Scraping sound when push on speaker lightly
terzaghi #363183 01/09/12 09:13 PM
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those subs that can play 5-15 Hz are quite rare indeed.
http://rotarywoofer.com/

Re: Scraping sound when push on speaker lightly
J. B. #363209 01/10/12 02:31 AM
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Cool, thanks for the link JB - that's the 1st I've heard of that technology.


Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1
Re: Scraping sound when push on speaker lightly
J. B. #363220 01/10/12 03:49 AM
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Originally Posted By: J. B.
those subs that can play 5-15 Hz are quite rare indeed.
http://rotarywoofer.com/



and expensive! shocked

Re: Scraping sound when push on speaker lightly
terzaghi #363227 01/10/12 08:22 AM
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Deano Offline OP
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They are set to LARGE and crossover at 80hz. I didnt think the M80's would go down that low! I was using the sweeps to checking the sub to see the SPL readings for different lower frequencies to see how even they were.

Re: Scraping sound when push on speaker lightly
Deano #363228 01/10/12 08:35 AM
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Deano, welcome. If the mains are set "Large", there is no crossover for them. They play(or at least attempt to play)full range.


-----------------------------------

Enjoy the music, not the equipment.


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