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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: Re: question on driving Sound Labs with Atmas posted by Roy on July 21, 2002 at 10:56:57:
You could operate the MA-1 with about 2-4 db of negative feedback. Of course we all hope to operate our amps without any, but some speakers are designed for an amp that uses some. 2 db (the amount the the M-60 uses) would go a long way in the MA-1 towards linearizing the frequency response, without doing serious damage at all to the sound.The values used would be the same as are in the M-60 right now.
I didn't know that the bass transformer was not rolled off past the crossover point. Rolling it off would help to linearize the impedance of the speaker quite a lot! Work we have done here suggests that it is almost impossible to get two transformer windings to do the same work when they are paralleled; they tend to fight each other a little bit. If it is true that the bass winding is not rolled off then there is yet some optimization to do!
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Follow Ups
- Re: question on driving Sound Labs with Atmas - Ralph 11:00:14 07/22/02 (5)
- roll-off of the bass transformer in the SL spkrs - Lew 07:42:31 07/25/02 (2)
- Re: roll-off of the bass transformer in the SL spkrs - Roy 15:44:13 07/25/02 (1)
- Re: roll-off of the bass transformer in the SL spkrs - ivanj 09:10:40 07/27/02 (0)
- Re: question on driving Sound Labs with Atmas - Roy 13:33:56 07/22/02 (1)
- Re: question on driving Sound Labs with Atmas - ivanj 07:29:54 07/25/02 (0)
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