Infinity IRS Sigma EMIM - What Should I Do About This???

[v***@yahoo.com]

Take a look: http://tinyurl.com/gdppg

Has anyone seen this before?

Whatever this is, it came one very rapidly. I inspect these speakers
often and this just became apparent over the past 2 weeks.

Strangely, it doesn’t appear to have any impact on the sound. I ran
sweep tones at 90DB and both speakers sounds just fine.

What, if anything, should I do about it?

Thanks,

VoH

[Mike Gilmour]

Post by v***@yahoo.com
Take a look: http://tinyurl.com/gdppg
Has anyone seen this before?
Whatever this is, it came one very rapidly. I inspect these speakers
often and this just became apparent over the past 2 weeks.
Strangely, it doesn't appear to have any impact on the sound. I ran
sweep tones at 90DB and both speakers sounds just fine.
What, if anything, should I do about it?
Thanks,
VoH

The coating that was applied on to the magnets is now peeling. The action is
to disassemble the unit, remove the remainder of the coating and replace
with an equally thin film of corrosion inhibitor. The magnets are powerful
and disassembly and reassembly should be done as per instructions.
(Somewhere I have that information - I'll look it out).

Regards,

Mike

[v***@yahoo.com]

On 6 Oct 2006 18:30:19 GMT, "Mike Gilmour"

Post by Mike Gilmour
The coating that was applied on to the magnets is now peeling. The action is
to disassemble the unit, remove the remainder of the coating and replace
with an equally thin film of corrosion inhibitor. The magnets are powerful
and disassembly and reassembly should be done as per instructions.
(Somewhere I have that information - I'll look it out).

Much obliged Mike, that information would be most helpful.

Regards,

VoH

[Peter Wieck]

Post by v***@yahoo.com
Take a look: http://tinyurl.com/gdppg

Looks like ozone attack on the foam damping material. Which is endemic
of a certain generation of speakers, all makers, many models.

My advice would be to use a soft brush to remove the loose material
(and it will continue until it is all gone) and hope that the
deteriorated foam does not serve as a critical gasket, spacer or
vibration dampener under operating conditions. If it does, you will
have to do the functional equivalent of replacing a normal cone-speaker
surround.. which fail in the same way, usually suddenly and all-at-once
as you experienced.

Infinity is still with us, so they may be aware of this and have a
ready fix available.

Peter Wieck
Wyncote, PA

[Mike Gilmour]

Post by v***@yahoo.com
Take a look: http://tinyurl.com/gdppg
Has anyone seen this before?
Whatever this is, it came one very rapidly. I inspect these speakers
often and this just became apparent over the past 2 weeks.
Strangely, it doesn't appear to have any impact on the sound. I ran
sweep tones at 90DB and both speakers sounds just fine.
What, if anything, should I do about it?
Thanks,
VoH

I have located the pdf Infinity Service Bulletin regarding EMIM surface
peeling from magnet assembly and how to rectify the problem, will send to
you direct.

Mike