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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: Unlikely to be possible posted by cpotl on November 15, 2015 at 08:18:12:
Absolute phase isn't a new concept, and I remember that it was investigated by a few reputable groups in the mid-'80s. The double-blind results were indistinguishable to listeners who were generally regarded as being "audio-aware." :) That was with solid state gear however, not tubes, so I can't respond to potential results using an asymmetrical amplifier. On the other hand, distortion in the SETs I build is very low, so much so that I don't consider their even-order contribution to be sufficient to produce an audible sonic signature.Incidentally, even-order distortion is not confined to positive-negative asymmetry. A square wave can generate huge amounts of even-order energy and still be completely symmetrical in this way. It only need have a duty cycle other than 50%. I have personally witnessed this effect using lab-grade spectrum analyzers and variable duty cycles, and it can be simulated using the FFT function in SPICE programs. The point I'm making is that if absolute phase were audible (and I believe it's not), an asymmetrical amplifier probably isn't required in order to hear it.
Edits: 11/15/15 11/15/15
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Follow Ups
- RE: Unlikely to be possible - Triode_Kingdom 10:46:33 11/15/15 (1)
- RE: Unlikely to be possible - cpotl 12:40:26 11/15/15 (0)
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