or Connect
Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › QUAD ESL 57 Refurbish and Repair
New Posts  All Forums:Forum Nav:

QUAD ESL 57 Refurbish and Repair

post #1 of 31
Thread Starter 

Dear Head-Fi,

 

I am aware that this ain't a forum for loudspeakers, but anyway.

Recently bought a vintage set of Quad ESL speakers.

Has anybody here done any DIY refurbish to these speakers and can give me some clue regarding this procedure? I am about to remove and replace all the panel's dustcovers without damaging the stators and the diaphragm.

 

Any information is welcomed!

post #2 of 31
Thread Starter 

post #3 of 31

I have my 57's professionally refurbed by Wayne Picquet.   Expensive, yes, but I've always wanted these and now I have a pair that will last 20 years or more.   Longer than me.  

 

 

http://quadsunlimited.us/

post #4 of 31

Is there a reason you want to replace the dust covers?

post #5 of 31

The guy lives in Hungary and that restorer is in Florida.

post #6 of 31
Thread Starter 

Posting fragile stuff is not the main problem. I've read about Piquet's repairs, and they are among the best but there is no need for replacing anything except the dustcovers as they have a lots of patches and they are very brittle and do not want to spend a grand on a job that can be done easily at home (easy as it appears reading those documentations found on the net). Has anyone here experienced any DIY work with these beauties? Are there any threats that can happen with an aged panel?

post #7 of 31
Quote:
Originally Posted by wuwhere View Post
 

The guy lives in Hungary and that restorer is in Florida.

 

There are very good Quad refurb places in Europe.  

 

For example: 

 

 

http://quadesl.nl/

 

I've ordered parts from them and have always been pleased with their service. 

 

There's a place in Germany, too, but I'd lean toward the site above. 

post #8 of 31

If you want to DIY the refurbishment, check out this link for some How-To's:

 

http://www.quadesl.com/quad_ref.html

 

You haven't said anything about hissing, clicks and pops, or channel imbalance so your actual drivers are fine.  Putting on new dust covers shouldn't be too difficult once you get inside.

post #9 of 31
Thread Starter 

Well, actually there is a hissing, but at a very low volume (you can only hear it with your ears close to the panels).

There is 50 or 100hz hum also as you plug it in from the treble panel and fades out.

Nothing worse, it mainly would be just a cosmetical refurbish and inspection of tolerances over the whole speaker.

post #10 of 31
Thread Starter 

I am mainly afraid of that is the panels are in for a long time, and if I dismantling them would poses some unwanted effects that cannot be undone, like cracking the pvc stators or flaking the paint off, finding a huge corrode spot at the rivets etc


Edited by Nemeske88 - 6/12/14 at 3:12am
post #11 of 31
Quote:
Originally Posted by Nemeske88 View Post
 

I am mainly afraid of that is the panels are in for a long time, and if I dismantling them would poses some unwanted effects that cannot be undone, like cracking the pvc stators or flaking the paint off, finding a huge corrode spot at the rivets etc

You should ask somebody who sucessfully did it before - maybe some places doing refurb will be willing to share some experience ? 

 

The above menntioned concerns are real ones; but with ESL, it all boils down to the very sample at hand. If the thing works and hum etc can be removed by exchanging old capacitors etc, I would not proceed with dismantling the drivers themselves unless absolutely necessary. I have not been doing any work on Quad ESL speakers and can not speak from experience with these, but I do have experience with building ESL headphone drivers - principle is the same.

post #12 of 31

If the hissing isn't severe enough to distract you from the music at your listening position I'd recommend leaving the drivers alone.  Just redo the dust covers - it's a much simpler process and will help future proof the panels.

post #13 of 31
Thread Starter 

Thank you for your replies and tips so far. I will ask some domestic professionals also about this project if there any. I think it will be only the dustcovers, the diodes found in the EHT and some resistor tolerance checks at the audio transformer unit. Hope, It will work out well.

post #14 of 31
Thread Starter 

Thank you for the links, also

post #15 of 31
Thread Starter 

My first intervention: The substitution of the speaker's inputs to a better ones:

 

 

 

 

 

 

 

.... And a close look at one unit's treble panels.  It is obvious that the panel prevoriously opened by One Thing Audio as their sticker is on the back (and perhaps the diaphragm has changed as there are bolts instead of rivets)

 

 

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: High-end Audio Forum
Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › QUAD ESL 57 Refurbish and Repair