Phil Allison wrote:
"Rob"
I think one of my Dynaudio Contour 1.1 speakers has a fault. On music it
sounds as though something's rattling inside, or one of the drivers is
loose. I've taken the woofer out and it looks OK, insofar as I know what OK
is - nothing burnt or blown.

It's difficult to replicate with music, so I recorded a tone and this is
what it sounds like:

http://patchoulian.googlepages.com/speaker

It's a 500kB mp3 file.


** Sounds like the voice coil has partially detached from the cone and is
hammering in time with the low frequency tone.


Short of contacting Dynaudio and asking about a replacement woofer, any
suggestions?


** Run the test with the driver removed and see if you get the same
distorted tone.


OK - it still buzzes, but less loudly. I've put a sample on the web page.

Check for any object caught in the back of the frame or held by the
magnet.


Can't see anything - thanks anyway. The only thing that looks slightly
odd is what looks like a line drawn on the yellow cloth bit behind the
cone - but I'd guess that was some sort of manufacturing marker.

Rob