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Reiner E. Römer Oberhausen, Germany Fn: +49 208 6351070 Fx: +49 208 6351071 |
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CHAPTER> Refurbishing
and Upgrading Navigate Chapter> Shackman B&W DM70 Refurbish main Decca Kelly DIY Upgrading
These features below are only excerpts from our repair services infos. Follow the direct link to our special site ESL-loudspeaker-repair-service
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
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. You can also join the SHACKMAN Discussion Grouproup Actual SHACKMAN auctions Online-Shop |
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Reromanus Shackman |