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waldtraut 11th April 2011 03:46 PM

David Lucas ESL
I'm new to this forum but have been a DIYer for 20+ years. Built Lucas esl flat panels 10 yrs. ago and they continue to work well, although they have limitations. I've looked thru the esl threads and don't see much about Lucas. Is this because the design he used is not so good? Or because he went out of business right after I bought his stuff (1999 or so)? Looking forward to the wisdom of the DIY Audio group. Thanks.

CharlieM 11th April 2011 07:09 PM

I'm a recent convert (4 years ago) to ESL's and I'm not familiar with the Lucas speakers. Can you post a description and photos?

bolserst 11th April 2011 07:32 PM


Originally Posted by CharlieM (
I'm a recent convert (4 years ago) to ESL's and I'm not familiar with the Lucas speakers. Can you post a description and photos?

There was a bit of "discussion/airing of opinions" on the David Lucas kits in the "Electrostatic AMT" thread last year. Posts #203 - #216

I posted scans of some of his print ads in post #211

CharlieM 11th April 2011 07:56 PM

Those ads are a hoot! And I just read Jer's post about the defunct web link connecting to a crappy porn site. Now that's an original marketing scheme if I ever heard one! Get a visual on this one: Crack-ho porn starlets selling electrostats!

Still, over the top marketing doesn't necessarily mean the speakers are crap so I'm [cracking up a little but] witholding judgment until I see what they are.

Can we see some photos?

geraldfryjr 11th April 2011 09:16 PM

Yea,well he (david lucas) still owes me the money or the plans to his super bass corner ESL's from back in 1992.
And, I'm sure, I'm not the only one still waiting.

There has been a few people claiming that have built and/or seen his kits.
But,I have yet to see any pictures or details, in these threads, of a finished product from him. jer

Few 12th April 2011 03:06 AM

David Lucas: The gift that keeps on (not) giving.

Some stories just never get old.

Nonetheless, if the original poster can provide some details of the design, I expect some useful advice can be offered by this group. Waldtraut: If you can be more specific about the limitations you've run into, others may be able to help you determine whether they are specific to the Lucas design and may also be able to suggest modifications that are beneficial.

waldtraut 12th April 2011 12:03 PM

I'll work on posting some pix of my Lucas flat panels. Lucas plans called for using "Lincane" perf aluminum (like you see on home radiator covers), a graphite coated Mylar membrane heat shrinked with a paint remover heat gun. 1/16" double sided Foam tape (3M?) was used for the segments and spacer dots and the kits came with aluminum foil tape and a clear conductor substance that was used to stick the aluminum tape to the membrane and stators. Don't know the design of the electronics used because the bias supply (running off speaker inputs) and an arc-limiting circuit he supplied are in potting material (can it be melted so I can reverse engineer the circuits?). My biggest gripe is they aren't very loud compared to my other systems and you have to sit right in front of them for the best sweet spot, problems I know are inherent with ESLs. But, they have lasted ten+ years.
The sub-woofer ESL is made up of six panels of differing sizes stacked one behind the other. Two channels are arranged in a V configuration. I believe the panels are wired in parallel, but the sub itself is supposed to be wired in series with other mid/high range speakers (whether ESL or conventional speakers, I don't know.) I haven't built these subs so I can't pontificate on sound issues. I have the plans for the subs, flat panels, and curved panels if anybody wants them.
I had a good experience buying stuff from Lucas over a year or so, and his "sales manager" Tim Kelly seemed OK. Sorry to hear some have been ripped off. I guess it was hard to produce/market ESL kits in the old days even when Speaker Builder was around...even harder now, I suppose. He didn't lack for marketing hype....

geraldfryjr 12th April 2011 12:43 PM

I would like a copy of the plans if possible.
Especialy for subs, his configuration might be worth a second look and exploring a little deeper, as it was the sub plans that had caught my attention back when a friend introduced me to the very apogee's that I now have in 1992.

The problems of them not being very loud may very well be caused from a poorly designed bias supply aswell as less than sufficeint transformation ratio of the driver transformer.

wolf_moses 12th April 2011 01:16 PM

David Lucas ESL
Lucas not only took my money without sending any plans for the sub, as a bonus he sent me an abusive letter. I complained to the editor of Speaker Builder, who ignored me. I cancelled my subscription.

I would appreciate a copy of the sub plans.

audioantique 20th December 2011 12:07 PM

David Lucas Subwoofer Ad
1 Attachment(s)
For what it's worth, here's an image of the Davis Lucas subwoofer ad

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