In Reply to: RE: Roger Modjeski and direct-drive ESL amplifier posted by Ralph on January 1, 2014 at 08:49:49:
was Dayton Wright. The massive (a 150 lb. chunk of metal resembling a large power amp) power supply/step up transformer unit had very heavy hardwired output cables to each speaker that made heavy duty automobile jumper cables look a little dainty :-) Those cables were I believe 15 ft. long, transmitting up to 15 kV in the case of the XIM-11 professional model PS/xfmr unit. The much more common XIM-10 consumer model put out a mere 9 kV :-)
Naturally with today's safety regulations such a thing would never fly. But fortunately Mike Wright must have known what he was doing because I never heard of anyone getting fried.
"Ideal" audio product characteristics:
- Esoteric and dangerous (John Iverson, anyone?)
- Expensive
- Unavailable
Well, DWs were available back in the day.
Brian Walsh
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Follow Ups
- One ESL manufacturer who did something potentially lethal - Brian Walsh 21:34:08 01/05/14 (11)
- More than THAT for Gods sake !! - drlowmu 20:23:47 01/26/14 (0)
- Were those DWs directly driven? - Lew 11:13:37 01/06/14 (9)
- it is not the wire that needs to be thick :) - Penguin 09:05:53 01/11/14 (3)
- I was thinking of the outer diameter, insulation and all - Lew 11:34:06 01/13/14 (2)
- the Innoxx production amp - Penguin 19:34:39 01/13/14 (1)
- RE: the Innoxx production amp - Lew 09:30:19 01/14/14 (0)
- RE: Were those DWs directly driven? - tyu 09:45:00 01/07/14 (4)
- RE: Were those DWs directly driven? - Lew 13:12:38 01/07/14 (3)
- Sound lab bias........ - tyu 02:48:34 01/08/14 (1)
- RE: Sound lab bias........ - Lew 07:12:45 01/08/14 (0)
- RE: Were those DWs directly driven? - tyu 13:59:31 01/07/14 (0)