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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: Service manual/schematic for Quad ESL-988 + modding tips? posted by kentaja on September 16, 2012 at 13:11:48:
A follow up. I read the article again and the comments about the panels catching fire is rather silly. I suppose in theory it is possible but highly unlikely I would say virtually impossible.
I have done experiments defeating the sniffer circuit and let the panels spark away. Thousands of cycles of sparking. Have they ever caught on fire? Nope. Of course the panel looks like Swiss cheese afterwards!
Is there a scenario where the Mylar might ignite and catch on fire? Yes. I produced a panel that dropped the surface resistance well below what would be acceptable for stable performance. In this experiment the Mylar did catch on fire. Talk about cool! Took several seconds for the Mylar to completely burn away. There was no damage to the stator assembly it was easily rebuilt and the panel worked fine again.
What can happen without FS2 in place is someone uses a very small wattage amp and just clips the snot out of thing. How can someone listen to it that way? Can't they hear the amplifier clipping? What will happen when abused this why is the R1, R2 resistors will fry burning the PCB and making quite a mess but this take perhaps 10-15 minutes of constant continuous clipping. The board is a charred mess and has to be replaced. But I seriously doubt the speaker is going to catch on fire.
I have never seen another electrostat that the maker is concerned with the speaker catching on fire and adds protection circuits to stop such a thing. This is really grasping at straws.
If someone clips an amp in this fashion and continues to pound on the speaker and abuse the thing in this way they deserve the damage that is caused and the repair bill that will follow. I see no reason to degrade speaker performance to stop this kind of abuse.
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Follow Ups
- RE: Service manual/schematic for Quad ESL-988 + modding tips? - kentaja 19:26:13 09/16/12 (0)
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