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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: If you are still using the Aliante Pinafarina Ones, posted by thetubeguy1954 on December 20, 2006 at 05:35:11:
that compares your Aliante Pinafarina One speakers with Sonus Fabers. I'd have not responded if I hadn't had the recent experience with Sonus Fabers I described. Your speakers are rated as 6 ohms, and I believe with my engineering sense that this is too low for SET amps to drive properly. With such refined speakers, you owe it to yourself to explore the control issue.As to SETs, as I said, they do not have crossover distortion because they do not trade the driving duty between different output devices. "Crossover distortion" arises from output device impedance changes when near the zero crossing, when one device takes over from the other. Crossover distortion can be made to look small in the context of total harmonic distortion. However, we hear the delicate details at very low absolute power levels, and the crossover distortion is a large issue at those levels.
Single-ended linear designs require large amounts of standby power, and large and robust output devices. SET amps with decent power ratings need output transformers that can handle a lot of DC current. These requirements place the absolute performance of the amps at the mercy of the details of the output device and transformer design.
Switching amps also do not have crossover distortion in the sense that linear push-pull amps do. They are constantly crossing over between two sets of output devices at very high frequencies, and the details of how the control circuits manage this determine how low their audio distortion is.
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Follow Ups
- I'm extrapolating from your comment in your user profile - Al Sekela 12/20/0614:35:49 12/20/06 (0)
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