I am not convinced by SEAS explanations... I am sure at least the xmax of the driver could be affected.
I have seen other rubbers in the automotive world become smaller, they look to be dried. I think in general, rubbers have less good quality. Perhaps for ecological reasons the process to make rubber is different and less good ?
If we have an expert in rubbers I would be very pleased to have an explanation ?
I have never seen very old rubber on very old drivers have cracking.
I have seen other rubbers in the automotive world become smaller, they look to be dried. I think in general, rubbers have less good quality. Perhaps for ecological reasons the process to make rubber is different and less good ?
If we have an expert in rubbers I would be very pleased to have an explanation ?
I have never seen very old rubber on very old drivers have cracking.
Hello, I will activate this thread. I am owning two Thor Evo 04 Speakers with four "Seas Excel W18E001" Drivers. Some days ago I recognized scraping noises from one Speaker. I looked very closely to the drivers and saw this (see Attachments). The Drivers are 9 years old. I am owning an 8 years old Center with the same drivers, too. And they have the same problem.
The drivers never stood in the sun and they had never been cleaned with anything.
I contacted the Seas distribution in Germany. Seas wrote them:
"This is something that we see from time to time. Rubber is a material with a limited lifetime even if not exposed to extreme conditions. These are 9 years old units and even with high quality materials used we can unfortunately not expect an 'endless' life time for the units."
In other words: The drivers are on the way to destroy themselfs after 9 years of using and Seas wrote, they see this "from time to time". That's the response from a premium manufacturer! They are so "nice" and offered me six new Drivers with 20 % off.
Here, in this thread, the user "JDeV" reported similar experience with the same drivers. He got this reaction from Seas:
"Dear Johan,
This type of cracking has nothing to do with sunlight (ozone).
The reason for this is a chemical reaction between the magnesium cone, the glue, and the rubber.
We have seen it happen before, but do not fully understand the reason why it happens on a few drivers.
The good thing, is that this should not influence the acoustical properties of the driver. We have tested a similar driver, and no repair is needed. It’s just a cosmetically issue.
We believe that you still will have many, many years of the perfect listening experience."
This is not true. I wrote above, that one of my drivers is making scraping noises since some days. After 9 years of using.
The drivers never stood in the sun and they had never been cleaned with anything.
I contacted the Seas distribution in Germany. Seas wrote them:
"This is something that we see from time to time. Rubber is a material with a limited lifetime even if not exposed to extreme conditions. These are 9 years old units and even with high quality materials used we can unfortunately not expect an 'endless' life time for the units."
In other words: The drivers are on the way to destroy themselfs after 9 years of using and Seas wrote, they see this "from time to time". That's the response from a premium manufacturer! They are so "nice" and offered me six new Drivers with 20 % off.
Here, in this thread, the user "JDeV" reported similar experience with the same drivers. He got this reaction from Seas:
"Dear Johan,
This type of cracking has nothing to do with sunlight (ozone).
The reason for this is a chemical reaction between the magnesium cone, the glue, and the rubber.
We have seen it happen before, but do not fully understand the reason why it happens on a few drivers.
The good thing, is that this should not influence the acoustical properties of the driver. We have tested a similar driver, and no repair is needed. It’s just a cosmetically issue.
We believe that you still will have many, many years of the perfect listening experience."
This is not true. I wrote above, that one of my drivers is making scraping noises since some days. After 9 years of using.
Attachments
Some news: Today Seas offered six new drivers with 50 % off. That is much more better than 20 % and I will make the deal. Otherwise: The best were, my drivers had not had this problem.
Many thanks to "Intertechnik" in Germany. They managed the contact to Seas in Norway perfectly.
Many thanks to "Intertechnik" in Germany. They managed the contact to Seas in Norway perfectly.
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