Would something like the Quad 606 solid state amp be good on the 57s? I've heard one on my 63s and it sounded pretty nice. I know very little about 57s though. The 63s are easier to drive it seems.Neither is a good choice a priori.
Here's the deal about ESL-57s. They're insensitive and they will not tolerate much power (the panels will arc and be more or less rapidly and profoundly damaged - tweeters are the more sensitive of the two panels to arcing). Finally, they present an interesting load to an amplifier, being virtually a short circuit at high frequencies.
Use a Quad amp (the orignal Quad II monoblock, at about 15 watts, is arguably the perfect amplifier for them) or a good, low powered "third party" vacuum tube amp for best results. I generally use PP EL84 amps with mine, for example. If you scour the web, you can find lists of safe amplifiers to use with them.
http://www.quadesl.com/quad_main.html
![]()
If they don't work it would be reasonable to get rid of them.
You'd list them on the Bay. People would still pay a good sum. We're talking about Quad 57, not a pair of defunct speakers from a cheap mini set.

Would something like the Quad 606 solid state amp be good on the 57s? I've heard one on my 63s and it sounded pretty nice. I know very little about 57s though. The 63s are easier to drive it seems.
better off sending them over to refurbish. i think it's a couple hundred each panel. you should rebuild the power supply and crossovers though. bake them in the oven to melt the wax and change the diodes.You'd list them on the Bay. People would still pay a good sum. We're talking about Quad 57, not a pair of defunct speakers from a cheap mini set.
Serial numbers 14940 and 15681, from information I've found online it would appear these were manufactured in 1965 and most likely have the epoxy potted power supplies (I haven't opened them up yet).
Plenty of Quad ESL-57 info on teh webs; I presume you're hip to all of that jive already, yes?
This is the company that rebuilt my Quad ESL 63s, through their previous owner. Electrostatic Solutions.
http://www.estatsolution.com/index.php?bod=0
They're like new and sound amazing- they also sell individual parts for the 57s.