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Old 30th November 2009, 09:06 PM   #201
Kontra is offline Kontra  Russian Federation
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Quote:
Originally Posted by mige0 View Post
Hallo Kontra, ich schlage vor du wiederholst dein Posting #196 in Deutsch und ich übersetze dann.
Dieses Posting #196 ist bisher die beste Zusammfassung aller technischen Daten deines Designs. Daran sind hier alle sehr interessiert.

Hello Kontra, I suggest you repeat your posting #196 in German and I try to translate.
This posting #196 is your best summary of the technical specifications of your design until now. People around here are interested the most in this.

Michael
I anderstud u. Completely. Qualitatively. I shall write when I will be helped by friends from Russia.
Thank all of you for understanding.

Vollstдndig. Qualitativ. Ich werde schreiben wenn mir die Freunde aus Russland helfen werden.
Danke Ihnen alle fur das Verst?ndnis.
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Old 15th February 2010, 05:02 PM   #202
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i just found this as i have not yet read the compleat thread in its entirety yet.since the summer of 2006 i had been throwing around the same idea.only i was planning to use it strictly for a bass unit thus dramaticly increasing the displacement for a given surface area using esl technology.therefore keeping thd very low and increasing surface area for a higher output .i would like to hear some thoughts on this meanwhile i'll go back to page one and finnish reading, thanks. jer
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Old 15th February 2010, 07:17 PM   #203
Few is offline Few  United States
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There was a guy who used to place ads in SpeakerBuilder a bunch of years ago. He was selling ESL kits, including one designed to generate bass. The ads were a bit strange, and my impression was that the person running the business accumulated a less than stellar reputation, but what little information was included in his ads led me to believe he was stacking ESL panels front to back. I don't know if the diaphragms all operated in phase, or whether alternating diaphragms operated out of phase (which would make it somewhat like an AMT). Perhaps someone here has more information or even built one.
Few
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Old 15th February 2010, 07:41 PM   #204
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yes, i remember that, and almost fell a victim of it .his name was dave some thing(it's on the tip of my tounge too) there were some that claimed i good product and some claimed lack of support and alot that got ripped off as i almost did it was in the very early 90's. by the looks of the drawings in the magazine it had 2 or 4 panels aranged in a v shape using the corner walls as a type of corner loaded horn i searched this site and all over the web. his name came up but never any details of the system.if i remember the name i'll post it for you. jer
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Old 15th February 2010, 09:49 PM   #205
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Quote:
Originally Posted by Few View Post
There was a guy who used to place ads in SpeakerBuilder a bunch of years ago. He was selling ESL kits, including one designed to generate bass. The ads were a bit strange, and my impression was that the person running the business accumulated a less than stellar reputation, but what little information was included in his ads led me to believe he was stacking ESL panels front to back. I don't know if the diaphragms all operated in phase, or whether alternating diaphragms operated out of phase (which would make it somewhat like an AMT). Perhaps someone here has more information or even built one.
Few
I'd forgotten all about those David Lucas ESL kits. I remember seeing ads for the ESL "subwoofer" with what appeared to be stacked stators with multiple diaphragms. But, like you, I could not figure out if it was an AMT configuration, or a multiple diaphragm arrangement like the ML CLX. It sure got me curious though...

A friend of mine purchased one if the double impact kits. The perforated sheet metal was thin and soft and not coated well enought to keep from geting shocked or arcing. The diaphragm material was crinkly 1 mil. The "special" foam tape was of poor quality with variably thickness, and poor adhesive. The "high-power" fullrange step-up transformers were 15Watt tube amp transformers run backwards. The cores saturated easily with any signal information below 200Hz or so. We used the metal and pitched the rest.

Based on that experience, I quickly lost interest in his ESL subwoofer.

Last edited by bolserst; 15th February 2010 at 10:12 PM.
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Old 15th February 2010, 10:43 PM   #206
Few is offline Few  United States
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David Lucas! That's the one I was thinking of. Given his track record I wouldn't want to base any design decisions on anything he sold, but his bass speakers came to mind when jer posed his question.
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Old 16th February 2010, 04:33 AM   #207
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ah yes,david lucas.thanks bolserst.do you recall how the arangement was set up?
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Old 26th May 2010, 02:19 PM   #208
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Default David Lucas Shock Wave ESL Subwoofer

Quote:
Originally Posted by Few View Post
There was a guy who used to place ads in SpeakerBuilder a bunch of years ago. He was selling ESL kits, including one designed to generate bass. The ads were a bit strange, and my impression was that the person running the business accumulated a less than stellar reputation, but what little information was included in his ads led me to believe he was stacking ESL panels front to back. I don't know if the diaphragms all operated in phase, or whether alternating diaphragms operated out of phase (which would make it somewhat like an AMT). Perhaps someone here has more information or even built one.
Few
I finally located a copy of the ad for the David Lucas ESL subwoofer.
Obviously not much detail here, but looks to be a 2 pleat AMT using multiple diaphragms in each pleat to increase the available Force per unit area as suggested by Baxandall.

Enjoy this "Secret of the Century"...haha
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Old 27th May 2010, 02:32 AM   #209
Few is offline Few  United States
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Whoa! What a flashback! Thanks for the memories.

So was that the secret of this century or the last one? I don't want to waste time seeking this century's secret if he already has dibs on it.
Few
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Old 27th May 2010, 09:08 AM   #210
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Default Century -11 approximately

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So was that the secret of this century or the last one? I don't want to waste time seeking this century's secret if he already has dibs on it.
Few
LOL. But surely there can be only one "The Century". I think it was 1111 - 910 B.C.
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