..the right way to treat an OTL amp...

Posted by Paul Speltz on April 5, 2001 at 16:37:05

In Reply to: Re: Last Call for Autoformers posted by Jan Hass on April 5, 2001 at 15:46:44:

Jan,

I agree. The best way to treat an OTL amp is to directly connect them to your speaker. Since OTL speakers love higher impedance loads, my approach was to make low impedance speakers feel like a high impedance load as transparent as possible. Now the benefit of higher impedance needs to be weighed against any loss because of the added component in the circuit. My ears tell me that the loss is essentially zero (pun), so it is an easy decision for me. It will be interesting to hear from the others when they get their ZEROs what they hear and what they feel the cost-to-benefit ratio is. I think that most of the people that are interested in the ZEROs are living with a mismatch problem that they can hear and would like to solve.

Also, be aware that these are autoformers not transformers. The music goes out on the same winding wire that it comes it on. See Schematic on ZEROs page.

I found a domestic source that was much more willing to entertain my "crazy" specifications, and understands hi end audio.

Paul Speltz

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Follow Ups Full Thread

Topic - Last Call for Autoformers - Paul Speltz 08:39:09 04/03/01 (24)

Re: Last Call for Autoformers - Ralph 13:34:46 04/09/01 (4)

Hun? - Dan 20:58:32 04/17/01 (0)

Re: Last Call for Autoformers - Travis 16:45:05 04/09/01 (2)

Am I the first? - Paul Speltz 19:08:24 04/09/01 (1)

Re: Am I the first? - Joseph Stocco 19:54:22 04/09/01 (0)

Re: Last Call for Autoformers - Allan 04:38:17 04/07/01 (1)

Inductance ? - Paul Speltz 14:11:54 04/07/01 (0)

Re: Last Call for Autoformers - jim 08:03:03 04/06/01 (1)

Coincident Super Eclipse - Paul Speltz 15:20:42 04/06/01 (0)

Re: Last Call for Autoformers - Dennis Ketterer 07:36:02 04/06/01 (1)

Re: Last Call for Autoformers - Paul Speltz 15:28:11 04/06/01 (0)

Re: Last Call for Autoformers - Garland 18:00:46 04/05/01 (3)

Re: Last Call ???? - Paul Speltz 05:34:21 04/06/01 (2)

Re: Last Call ???? - Jan Hass 02:21:10 04/07/01 (1)

Air Gap ? - Paul Speltz 14:01:52 04/07/01 (0)

Re: Last Call for Autoformers - Jan Hass 15:46:44 04/05/01 (1)

..the right way to treat an OTL amp... - Paul Speltz 16:37:05 04/05/01 (0)

Picture of "ZERO" - Paul Speltz 09:30:57 04/04/01 (0)

Re: Last Call for Autoformers - George M 12:46:12 04/03/01 (2)

"gilding the lilly?" - Paul Speltz 15:08:41 04/03/01 (1)

Double Duty - Paul Speltz 15:19:39 04/03/01 (0)

Re: Last Call for Autoformers - Lew 12:17:43 04/03/01 (2)

Autoformers / ESL - Paul Speltz 14:50:02 04/03/01 (1)

Re: Autoformers / ESL - Lew 07:26:59 04/04/01 (0)

Follow Ups

..the right way to treat an OTL amp... - Paul Speltz 16:37:05 04/05/01 (0)

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