Hello only just joined this forum so playing a little catch up not sure if it is of interest to others but if it helps or has some merit will add . I bought a pair of Quad ESL57 speakers in November . Thye seemed in very good condition and sounded pretty good . However when I used an Dspeaker Antimode unit on them it became obvious that there were issues with the bass panels.
Following a recommendation from another Quad enthusiast I took the plunge and delivered my speakers to Andrew at A QuadThing Limited who after stripping them down gave me the good news / bad news . Good news was the spaekers had been fitted with One Thing new mains input boards and there Widget to protect the speakers from too powerful amplifiers. Also the treable units were newish One Thing Aduio panels in both speakers and they were fine.
Bad news the bass panels were original Quad Units and all four were in dire need of full strip and refurbishment . Andrew was also a little concerned at the quality of the wiring so we agreed this would be fixed and he would respray the speakers my preferred black. All of this has now been done and Andrew says they are sounding excellent equal to the ones he has and I heard when I delivered my speakers. Sadly not able to collect till Friday (the tension and anticipation is killing me) and even when I get them back they will need a full set up with Dirac Live before I can settle down and play some music.
Would anyone be interested in me giving details here of how they sound ? If you do just add to the thread and I will put something on over the weekend . Do not expect anything too much from me on Friday as it is going to be a music binge and the panels will need to get up to charge and get run in before they truly sing . Andrew gave me advice which I had found to be correct that due to the thickness of the mylar film they take quite a while to get fully charged and should be left on all the time . After about two days they will sound even better .