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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: OTL + Zero = non-OTL amp? posted by Bombaywalla on October 17, 2006 at 09:42:48:
The effectiveness of the ZERO is the fact that the amp driving it already is comfortable with a 16 ohm load. Most tube output sections are driving between 1000 and 5000 ohms. So the result is something that has not been done before- in effect the gestalt amplifier is not an OTL but it is not working inside the conventional transformer-coupled constraints either. This would not be possible if you did not start with an OTL to begin with.On speakers where the amp is uncomfortable (for example, M-60s driving Magnaplanars) this allows the amp to work quite well where it would not have done poorly before- in such a case there are no trade-offs. In the case of 8 ohm speakers there are trade-offs, but then you don't have to use the ZERO unless you want to- with a regular tube amp you have no option. So its something different- something that works. We generally recommend the ZERO if the amp is working with less than 8 ohms, and do not if the amp has 6 ohms or more to deal with.
With our larger amps 4 ohms is not a concern, although the ZERO is sometimes helpful with the MA-1 and speakers less than 4 ohms. If you look at the ZERO as a problem solver then you get a better idea of what its about.
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Follow Ups
- Re: something different - Ralph 12:28:55 10/17/06 (0)
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