Quote:
Originally Posted by davidhunternyc 
I would love to be able to restore an ESL-57 or vintage ESL-63 too.
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You really should. If you are that meticulous with the fan, you can find your way through an old Quad. I still haven't pulled my pair apart yet, but will as soon as the office stops keeping me there 70-80 hours a week. I have all the parts and manuals. The biggest challenge is tensioning the diaphragms, but there are several methods to use. Though I haven't done it, it looks like careful, patient work, not necessarily difficult work. I'm also going to replace all of the components in the base. They work marginally well, but occasionally hiss and spit, so a rebuild is in order.
Also, I don't really think speakers have improved much since the ESL-63 came out in the early 1980s. Even Linkwitz carefully studied the Quads when designing the Orion+. The reason I went for the Orion+, as well, is because I wanted the bottom octave and some dynamic punch. The Quads will be restored and used as a bedroom system.
Quote:
Originally Posted by XxATOLxX 
That cast iron fan looks downright dangerous.
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They're really quite safe. Of course, don't ever be stupid enough to put something into it. However, the danger is so obvious that no one messes with them. Sort of like kitchen knives. Even the kids never really had to be warned - they knew. As for electrical and mechanical safety, there are zwro worries. These were designed to be left on for days or weeks straight. I've left them on for days and days and have never had a problem. Also, they're designed to be opened up and serviced. You can replace the wiring in minutes, which should be done every ten years or so.