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 9 responses by perkri

Thanks for the responses!

I'm using a Marantz 2230 while my EL34 amp is in for service. Not running them anywhere near 90db as I don't want a problem...

 Can not wait to get it back and see how it sounds with my "Ol' Faithful"

(Had a problem that was beyond my pay scale to deal with...)

@atmasphere 

How do OTL amps fair with the wide impedance curve imposed on the amps by the speakers?




@audiokinesis 

Thanks for that suggestion! There is a stand/frame that is available for the ESL-57's that raises the speaker and blocks the space beneath the speaker. It weighs in excess of 110 lbs and is quite rigid. It is supposed to do all that you describe. But, shipping alone would be an issue, so I have not looked into the cost.

I'm going to make some temporary lets out of ply to figure out some kind of approach that works - and I can certainly attempt a "curtain" underneath.

Love sand filled boxes...
@atmasphere 

Well, one day when funds are plentiful, I hope to own one of your amps :)

I like "forever" things. Bought my Cary SLI-50 new back in 96' and its never leaving me. And thanks for the link, I'll be checking it out!

@whart 

According to my serial numbers, they were made in 73'. They really have a unique and magical quality to them.When I have the courage to dig into them, I'll be looking at the boards/components and see how well they have been treated in their previous life.I got them for what I think was a really good price, but sending them out for a complete rebuild isn't in my immediate future.
Hours of entertainment for sure :)

I feel like, from what I've seen as far as doing up the protection and rebuilding the other boards, they should, repeat, should be within my grasp.

The panels? No way!!! Not going anywhere near those suckers!!!
Thank you all for the info!

Ive been thinking about building a First Watt F6, has anyone had any experience with that amp and the ESLs?

Was not familiar with the Bedini 25/25 and am asking about the F6 because of the 25/25. Wondering how the F6 would hold up with the crazy impedance demands of the ESL 57s.

P
Thank you for the Neurochrome suggestion. 
I came across the site before while doing some research for a friend. Very tidy PC boards! 
A soldering iron doesn’t fill me with fear, though I have had some experiences that would suggest I should perhaps approach them with caution...
The Quad II's are such nice looking units also! I have Quad in my auto search in Audiomart, and see them pop up every now and again.

They look like they would be a cool rebuild project!

And I suspect, they would work nicely with my Cornwalls as well!
The RM-10, opens up another door as far as amplification goes.

(There are an endless number of doors in the house of Audio...)

The person I bought them from was running them off a rebuilt vintage Electrohome EL-84 based amp. He felt they worked well with that amp.

Along with other amps I have been wanting to build is the Audio Note Kits EL-84 Integrated

Of those who have owned/listened to the ESL-57s, has anyone had any direct experience with EL-84 based amps?


For sure some research is required re: EL-84's

I wonder how much of a difference the transformers make with the tubes compatibility?