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Old 10th November 2005, 06:56 PM   #11
diyAudio Member
Join Date: Mar 2005
Location: Haifa
Dear Khanate

In the past 20 or so years, since the introduction of the esl63, I am not aware to any attempts from QUAD to forward the product, beyond cosmetic changes to P.W design.

Further development can be in the form of a gradual evolution (usually) , and sometimes (rarely) in the form of a real revolution.

Some ideas?
maybe trying to make esl "satellites" for home theater system, ...or an active esl with a built-in switching amp? maybe development of mass production techniques to make the speakers more affordable?

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Old 13th November 2005, 03:09 PM   #12
diyAudio Member
Join Date: Aug 2004
Location: Huskvarna

ESL 988 and ESL 989 are different to the ESL 63! The concept is still the same, of course....
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Old 17th November 2005, 10:00 AM   #13
diyAudio Member
Join Date: Mar 2004
Location: RLP

the electrostatic panels used in the ESL-988 and 989 are exactly identical to those which are used in the ESL-63. Both speakers employ exactly the same delay line. However there are lots of differences regarding the transformers, pcb`s in the loudspeaker bottom and dustcover mounting.

regards, audiomatic
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