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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: I asked him posted by Analog Scott on October 18, 2023 at 08:17:52:
I sent the following to him by email..."As I have explained many times, the problem with "scientific" A-B amp testing is that the amplifiers are connected to a common source and then into a speaker switcher, which can switch either amplifier into the speaker load.
What the ABXers fail to understand is that the distortion characteristics of an amplifier are reflected back into its input jacks because the feedback loop contains these distortions. Since the inputs of the amps are being fed from a common source, the sum of the distortions of both amplifiers are present at the input of either amp being used. Thus essentially both amplifier under test under these conditions will sound the same, and generally the overall sense of the listening session is unsatisfactory, for good reason."
How does this actually work? What are "distortion characteristics" as opposed to the actual distortion? How does that get separated from the actual signal and reflected back into the ABX box and effectively transferred to the other amplifier and visa versa? Have you measured this phenomenon?
Best wishes,
Scott"
He didn't answer any questions. He just sent a PDF manual for his ABX comparator. I don't see anything in the manual that addresses his claims, answers the questions I asked or shows any measurements to support his claims.
Edits: 10/18/23
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Follow Ups
- And he responded - Analog Scott 08:43:53 10/18/23 (0)
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