What causes driver surround damage / distortion?
Can it be fixed?
I'm hoping somebody's going to tell me: hair-dryer or steam or some other crazy solution.
Can it be fixed?
I'm hoping somebody's going to tell me: hair-dryer or steam or some other crazy solution.
That looks like localized heat damage. Was that close to a fireplace or a space heater on one side? The frame has discoloured on one side as well.
I think it’s a replacement job for sure.
I think it’s a replacement job for sure.
OK. Thanks. I'm not really looking to repair these drivers for use. They were cheap enough to replace. I was hoping to gain some wisdom if I ever have to repair a driver of consequence.
You know, like when people ask how to fix dust caps . . . There are weird, wonderful and very complex recommendations involving: Bluetack, adhesive tape, pins screws, glue . . . I've been pulling them out with a vacuum cleaner for years. I've got an attachment utilisng an old sock and some platic tubing.
You know, like when people ask how to fix dust caps . . . There are weird, wonderful and very complex recommendations involving: Bluetack, adhesive tape, pins screws, glue . . . I've been pulling them out with a vacuum cleaner for years. I've got an attachment utilisng an old sock and some platic tubing.
I would try the following.
Turn the speaker with the cone facing down put it on the table.
Take some small stones or dry sand and put it on the surround and leave it there for some days. Maybe the surround gets its old form back.
If not change it like already proposed.
Turn the speaker with the cone facing down put it on the table.
Take some small stones or dry sand and put it on the surround and leave it there for some days. Maybe the surround gets its old form back.
If not change it like already proposed.
Butyl rubber is typically used to make the surrounds of modern drivers.
The maximum working temperature of butyl rubber is 120 degrees celcius, above which its integrity is compromised.
In the case of the driver in the photograph, the butyl rubber has basically melted and de-formed.
Such de-forming will not be reversible, so there is no fix other than replacement.
Fixed!
1) Turn driver face down.
2) Fill surround trough with warm water.
3) Restore surround profile using eraser on pencil.
4) Leave for 20 minutes.
5) Drain water.
I don't know if it was necessary but I provided a signal to the inverted while it dried.
1) Turn driver face down.
2) Fill surround trough with warm water.
3) Restore surround profile using eraser on pencil.
4) Leave for 20 minutes.
5) Drain water.
I don't know if it was necessary but I provided a signal to the inverted while it dried.
you had courage using water as the paper cone could be damaged. now let it dry some days before use
My theory was the opposite: keep it moving as it dried to prevent it 'setting' into its previous panel. It's been in use for several days.