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#363137 - 01/09/12 06:55 AM Scraping sound when push on speaker lightly
Deano Offline
regular

Registered: 09/25/11
Posts: 5
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.

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#363151 - 01/09/12 09:50 AM Re: Scraping sound when push on speaker lightly [Re: Deano]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4106
Loc: Porch,enjoying Bombay Sapphire
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.

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#363159 - 01/09/12 12:27 PM Re: Scraping sound when push on speaker lightly [Re: BlueJays1]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13369
Loc: Iowa
I would call Axiom.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
(M22-OWM22-VP100)-all in storage


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#363162 - 01/09/12 12:41 PM Re: Scraping sound when push on speaker lightly [Re: SirQuack]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
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.



Edited by J. B. (01/09/12 12:44 PM)
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See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery

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#363181 - 01/09/12 04:08 PM Re: Scraping sound when push on speaker lightly [Re: J. B.]
terzaghi Offline
connoisseur

Registered: 04/04/07
Posts: 4863
Loc: Tulsa, Oklahoma
Did you have the m80's playing full range? That is even lower than an ep500 can play.
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#363183 - 01/09/12 04:13 PM Re: Scraping sound when push on speaker lightly [Re: terzaghi]
J. B. Offline
connoisseur

Registered: 01/19/11
Posts: 1291
Loc: Quebec, Canada
those subs that can play 5-15 Hz are quite rare indeed.
http://rotarywoofer.com/
_________________________
See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery

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#363209 - 01/09/12 09:31 PM Re: Scraping sound when push on speaker lightly [Re: J. B.]
cb919 Offline
connoisseur

Registered: 02/17/09
Posts: 1042
Loc: Ottawa, Canada
Cool, thanks for the link JB - that's the 1st I've heard of that technology.
_________________________
Dan
In/On Wall 500 w M2 Center Channel

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#363220 - 01/09/12 10:49 PM Re: Scraping sound when push on speaker lightly [Re: J. B.]
SBrown Offline
aficionado

Registered: 11/16/10
Posts: 890
Loc: Victoria,BC
Originally Posted By: J. B.
those subs that can play 5-15 Hz are quite rare indeed.
http://rotarywoofer.com/



and expensive! shocked

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#363227 - 01/10/12 03:22 AM Re: Scraping sound when push on speaker lightly [Re: terzaghi]
Deano Offline
regular

Registered: 09/25/11
Posts: 5
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.

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#363228 - 01/10/12 03:35 AM Re: Scraping sound when push on speaker lightly [Re: Deano]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10525
Deano, welcome. If the mains are set "Large", there is no crossover for them. They play(or at least attempt to play)full range.
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