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These features below are only excerpts from our repair services infos. Follow the direct link to our special site ESL-loudspeaker-repair-service

QUAD ESL 63/57    

Below you see a well done repair by a pro company, although again  with un-sufficient stretching. The mechanical diaphragm tension shows only half the value (left) than the original panel (right, black coating). That will result in  too low a resonance frequency. In this case the resonance frequency is half as low as it should be. The sound becomes  duller, less crispy and more distorted. But actually most important is the danger of  flapping and finally a "gluing" diaphragm during charging process . On the other hand, the sometimes recommended 2kg per strip tension is way too high. That will end up in too high a resonance frequency.

The image below shows a wrong coating of the same panel. It has the appropriate conductivity, but one can see very well defined borders of highly concentrated coating liquid. That are areas of higher conductivity which lets the charge keep moving  on the diaphragm . So the liquid has to be better distributed in order to provide constant and stable charge to the whole diaphragm area.  Not doing so will result in a kind of buzzing and an  unbalanced frequency response.

Interested? For more information, please go to our special site loudspeaker-repair-service 

Input filter modification of Quad ESL63

Replacing ELKOs by modern MKP/MKT

Subwoofer modification for Quads and other full range ESLs

We recommend dipole/ripole subwoofers for Quads

.We recommend to give your speakers/panels  to a pro service.

More info on  our special ESL repair site

The images on the left column show some examples for DIY repairing ESL57 panels without a stretching jig

Trust in our experience. You will be satisfied.

Prices depend on time spent. No costs for checking. Best lasting results guarantied.

It will pay.

Interested? For more information, please go to our special site loudspeaker-repair-service 

Prices depend on time spent. No costs for checking. Best lasting results guarantied. It will pay. 5 years warranty.

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