I put a 600 Watt amp on a pair of ESL 57s at a group meeting and watched the clip indictors on my amp light up trying to get more volume. The protection lights were lighting up on the speakers. Nothing broke For well over an hour, maybe as much as three.
The owner was an engineer. We knew what we were doing.
Don't worry, all my planars have all seen only mediocre power for the most part.
The 40 year+ ones that are still going strong? Where is your evidence?
Mine. It was well taken care of. But I had it refurbished couple years ago. Obviously, it improved with a new panels, but was it a night and day difference? No.
What 600 watt amp did you use? If the 600 watt amp was clipping into a Quad 57, that is surprising.
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