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Old 29th February 2012, 02:07 PM   #11
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Quote:
Originally Posted by dmsims View Post
With regards to the basket - it's straight

I took the pic at wide angle (macro) and there is a bit of barrel distortion
Then the problem is as described in #3 or as Sreten said the coil has delaminated due to excess heat and jammed in the gap.

The problem as described in #3 can be fixed without taking the speaker apart, a messed up voice coil requires a recone, generally all the moving parts of the speaker.

The back plate only has to move a fraction of a milimeter for the pole piece to pinch the coil, examining with a magnifiying glass may be needed to determine if that is the case.
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Old 29th February 2012, 05:52 PM   #12
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Quote:
Originally Posted by dmsims View Post
With regards to the basket - it's straight

I took the pic at wide angle (macro) and there is a bit of barrel distortion
It only distorted that one element in the picture ... nothing immediately adjacent to it? I can see the fuzzy corrosion between the bend and the outer frame .. matches the fuzz all over the basket .... is that a photo anomaly as well?
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Old 29th February 2012, 05:55 PM   #13
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Try moving the cone from the narrow point at the rear spider support. If you can move it around and free up the cone then it is fixable. If not you will need a recone kit.
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Old 29th February 2012, 06:05 PM   #14
dmsims is offline dmsims  United Kingdom
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Quote:
Originally Posted by puppet View Post
It only distorted that one element in the picture ... nothing immediately adjacent to it? I can see the fuzzy corrosion between the bend and the outer frame .. matches the fuzz all over the basket .... is that a photo anomaly as well?
When you say distorted are you referring to the foam gasket ? - (just to the right of black metal outer)

No the corrosion is crystalline and brushes off
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Old 29th February 2012, 07:09 PM   #15
puppet is offline puppet  United States
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Quote:
Originally Posted by dmsims View Post
When you say distorted are you referring to the foam gasket ? - (just to the right of black metal outer)

No the corrosion is crystalline and brushes off
No, the chrome basket. Everything else around that appears "straight". You can see the corrosion crystals between the bent basket and the outer (black) gasket? frame? .. whatever that is. How could one see that (crystalline corrosion) in between there if the basket wasn't bent out of the way enough to see it?

(shrug) According to your pic's .. it looks to me like that chrome basket is bent. That will tweak the cone enough to screw up the voice coil tolerances. That's why the cone is stuck. VC is trapped.
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Old 29th February 2012, 07:41 PM   #16
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This is the part my eyes can't quite sort out. It looks like it was dropped or something.
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File Type: jpg Screen shot 2012-02-29 at 12.38.47 PM.jpg (30.5 KB, 76 views)
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Old 29th February 2012, 09:11 PM   #17
puppet is offline puppet  United States
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This is the section of the photo I'm talking about:
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File Type: jpg Bent.jpg (51.7 KB, 73 views)
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Old 29th February 2012, 10:21 PM   #18
dmsims is offline dmsims  United Kingdom
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OK I can sort of see what you are saying in the picture but nothing is bent anywhere

The Seas distributor who I spoke with today described the frame as a "circle with ears on" - it's not a circle
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Old 1st March 2012, 01:36 PM   #20
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If it's shaped liked this, it's called a pin-cushion frame.
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