In praise of the ESL-57


About a week ago, I was doing a Kijiji search for some kind of EL84 amp that would be suitable for a rebuild. Buried in an ad for an amp was pair of ESL-57's also for sale. Based on serial numbers and production dates, they were from the early 70's.

Out of curiosity, I asked if the Quads were still available. They were and he had re-listed them in a separate ad at a reduced price. They were missing legs/feet and according to the seller were great otherwise. Grills looked to be in decent shape and after a bit of back and forth, I decided to get them.

Was pleasantly surprised when we arrived to get them. They looked quite good. No problems that couldn't be addressed without a little TLC and elbow grease.

Took a minute after I brought them home to plug them in, and when I eventually did, one was dead. Bad power cord...

Let them sit and charge for a bit and then started running them. After a little repositioning, they were set up as they should.

All I can say is wow. This was my first experience with these lovely speakers. Because of Covid, couldn't audition them before picking up and I have not had the opportunity to listen to a pair before. 

I now understand why they have the following and reputation that they do.

Everything I have read about these speakers is true. The first track I ran through them when they were set up was Jazz at the Pawn Shop. At some point during the intro, there was someone in the audience that "yelped" something or another. I was startled as I thought there was someone standing behind me. Crazy!

I'm surprised and how good the bass is on these. Based on what I had read, was not expecting them to have the depth that they do. (This is from someone who normally listens to Cornwalls...)

The "head in a vice" thing is very true for full benefit, but as I am currently listening to the radio in the background, they are filling the room well and are not fatiguing in any way, which is odd when you consider how fast/detailed/articulate they are.

So very pleased with them!!! As soon as time allows, some temporary legs will be made so I can both get them off the milk crates as well as figure out a design for what will be the final legs.




perkri

Showing 3 responses by whart

Biggest issue as far as I know is arcing- when I had mine refurbished, a protection circuit was installed. There are people who DIY repair these things but that's way beyond my competence. Lot's to read about them if you dig, though. 
I bought my pair in 1973-4 (the receipt is still around somewhere) and ran them until around 1990 when I switched to the 63, which had been modified by Crosby Audio Works. That speaker played louder, but lacked the coherence of the 57 in my estimation. My 57's were boxed from 1990 until a couple years ago, when I had them refurbished. I own a much bigger, far more costly system, but the Quad based system, using a pair of old Quad II amps that have been sympathetically restored (with good glass) is still a revelation. Lots of good info on the web about the old Quad, along with various modifications, stands, etc. Mine are back on their little factory legs, well out from the back wall, toed in, and are very satisfying in what I'd consider a modest sized room. Despite their significant limitations, they are still a marvel. Enjoy them. 
I would not under-estimate how good the Quad II amps are with the 57, though they are very underpowered for most applications, my Quads sing with them. When I originally had the 57s set up in the '70s, I used an ARC Dual 75a (which was new at the time) but I think the panels sound even better with the little Quad amps, which are readily findable and easily repairable. The Bedini 25/25 is supposed to be great, but how easy is it to find/condition/repair? 
I did splurge on the tubes, and found NIB GEC KT 66 matched quad for the amps, use a NOS Mullard rectifier and a GEC (rather than Walker's preferred Mullard) EF 86. (Those were also true NOS, originally designed with bare wires to be soldered into a circuit, Tubemonger converted them to use tube pins and fit into a conventional socket). Keith Snook's page is pretty good on the amp.