So based on the discussion below, I emailed RM himself. He was kind enough to respond, twice. Seems he does/will make direct-drive amplifiers, and he inferred that it would be no problem to make one for the Sound Lab speakers, or any other ESL, I guess. He does not do mods to the Beveridge amplifiers at this time, however.The URL for the vendor who sells his DD ESL amp is below.
I am not sure that 4000V is enough to get decent bass response from a Sound Lab speaker. Sound Lab uses a bass step-up transformer with a turns ratio of 1:200 or 1:250. However, I think RM meant to imply that he can fiddle with the voltage capability; I think.
Edits: 12/31/13
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Topic - Roger Modjeski and direct-drive ESL amplifier - Lew 07:58:08 12/31/13 (54)
- Do you know about the one available in Holland? - morricab 13:22:39 01/22/14 (3)
- A warning from your friendly link polizei - Penguin 14:45:47 01/26/14 (0)
- I was not aware of Twinstatic direct-drive - Lew 06:53:13 01/24/14 (1)
- RE: I was not aware of Twinstatic direct-drive - morricab 06:26:52 02/26/14 (0)
- RE: Roger Modjeski and direct-drive ESL amplifier - Michael Samra 01:11:48 01/05/14 (1)
- Bev vs other - Lew 11:04:11 01/06/14 (0)
- RE: Roger Modjeski and direct-drive ESL amplifier - AJ 10:00:30 01/01/14 (25)
- RE: Roger Modjeski and direct-drive ESL amplifier - airheadair 13:28:46 01/01/14 (21)
- Got a photo or some more info... - Lew 14:46:24 01/01/14 (20)
- RE: Got a photo or some more info... - airheadair 15:06:10 01/01/14 (19)
- Yep. - Lew 21:41:10 01/01/14 (18)
- RE: Yep. - airheadair 03:08:30 01/02/14 (17)
- Crossover - airheadair 03:13:28 01/02/14 (16)
- Klyne preamplifier - Lew 07:32:06 01/02/14 (14)
- RE: Klyne preamplifier - airheadair 21:20:06 01/02/14 (13)
- What model is that? - Lew 07:21:51 01/03/14 (12)
- RE: What model is that? - airheadair 09:58:52 01/03/14 (11)
- Klyne 6LX up and running the Beveridges - Lew 15:11:57 01/04/14 (9)
- RE: Klyne 6LX up and running the Beveridges - airheadair 21:22:10 01/14/14 (1)
- Just saw your post - Lew 07:43:45 01/15/14 (0)
- RE: Klyne 6LX up and running the Beveridges - Michael Samra 05:53:38 01/06/14 (4)
- RE: Klyne 6LX up and running the Beveridges - Lew 08:17:28 01/06/14 (3)
- RE: Klyne 6LX up and running the Beveridges - Michael Samra 13:46:27 01/09/14 (2)
- I have a Koetsu Urushi - Lew 18:31:50 01/09/14 (1)
- RE: I have a Koetsu Urushi - Michael Samra 14:11:25 01/12/14 (0)
- RE: Klyne 6LX up and running the Beveridges - airheadair 11:05:07 01/05/14 (1)
- It's the only SS preamp I've heard in my home in 30 years. - Lew 18:30:07 01/05/14 (0)
- RE: What model is that? - Lew 12:20:00 01/03/14 (0)
- RE: Crossover - airheadair 03:16:57 01/02/14 (0)
- Crossover, etc - Lew 12:57:43 01/01/14 (2)
- RE: Crossover, etc - AJ 17:21:10 01/01/14 (1)
- RE: Crossover, etc - Lew 21:59:21 01/01/14 (0)
- need more like 6000V to 7500V across - Penguin 08:30:44 01/01/14 (5)
- Are you referring to the Sound Labs? - Lew 12:51:06 01/01/14 (4)
- hmmm - Penguin 13:16:18 01/01/14 (3)
- Where do you get 4 ohms? - Lew 14:43:45 01/01/14 (2)
- 4 ohms - Penguin 10:44:58 01/02/14 (1)
- RE: 4 ohms - Lew 11:56:46 01/02/14 (0)
- RE: Roger Modjeski and direct-drive ESL amplifier - AJ 19:36:30 12/31/13 (15)
- RE: Roger Modjeski and direct-drive ESL amplifier - Ralph 08:49:49 01/01/14 (13)
- 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)
- I agree - Lew 13:00:36 01/01/14 (0)
- RE: Roger Modjeski and direct-drive ESL amplifier - Lew 08:21:12 01/01/14 (0)