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strange things for a woofer....
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thepastor View Drop Down
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    Posted: 25 January 2014 at 7:00pm
Hi guys, we have  a  woofer that have strange problem.... at low volume crackles and sounds bad ... but sounds great at high volume without any disturbance ... while the other cones that do the same action (same amp, same box and same frequencies reproduced) do not exhibit this problem, a pd 186 in a box es18bph ..... did you ever? does anyone know what it could be? thanks a lot
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Points: 4553 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2014 at 7:15pm
when not turned on, pushing on the cone gentle, does it rub or move freely.....
https://www.elements-audio.com
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thepastor View Drop Down
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i tried...it move freely...but depends where i put my hands to move it, sometimes i feel a slighty stuck with a slighty rubbing noise
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Points: 4553 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2014 at 7:31pm
if you push down, giving even pressure with fingers around dust cap, does it rub....
https://www.elements-audio.com
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thepastor View Drop Down
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if i do it around dust cap not, if i do it from external suspension ...  Yes..it rub!


Edited by thepastor - 25 January 2014 at 7:39pm
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have you taken driver out of cab and given it a good look over, checking rubber surround, etc....

https://www.elements-audio.com
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thepastor View Drop Down
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yes i do it ...and at my eyes seems perfect....
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of course except the noise when i move the woofer from external suspension......seems like a contact noise


Edited by thepastor - 25 January 2014 at 7:45pm
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Points: 4553 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2014 at 7:49pm
wicked, could be the early signs of a burn coil, but its hard to say....
https://www.elements-audio.com
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thepastor View Drop Down
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Points: 100 		Post Options Post Options   Thanks (0) Thanks(0)   Quote thepastor Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2014 at 7:54pm
yes, i play with this woofer in this condition from one year and never failed!!!Confused
...but now i decided to taken the driver out of his box and see what happens ... maybe is better to change it or repair it...i really don't know what to do...
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MarjanM View Drop Down
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Seems to me like a slightly deformed vc former that rubs a bit so it is noticeable on low power. But you dont hear it on higher level. I have had a few 12s exhibiting the same problem. Had to recone them Although they were working.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
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thepastor View Drop Down
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Points: 100 		Post Options Post Options   Thanks (0) Thanks(0)   Quote thepastor Quote  Post ReplyReply Direct Link To This Post Posted: 25 January 2014 at 8:25pm
and with the recone the problem disappeared? or can i continue to use it? in your opinion what is better considering the cost of recone?
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