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In Reply to: RE: Tone Controls posted by mkuller on November 25, 2014 at 11:23:07
"once had an Adcom preamp where you could use the tome controls or bypass them and the bypass sounded better."
I've got one of those. And one "feature" is that turning on the tone controls inverts the polarity. That may have been at least some of what you were hearing. For me that's the most useful thing they do as I find absolute polarity to often make the difference between enjoyment and background music.
I've read that polarity sensitivity is an indication of a problem in your speakers (ears too?) but whatever it's source it's handy to have a convenient handle on it without having to swap the speaker wires...
Rick
Follow Ups:
"I've read that polarity sensitivity is an indication of a problem in your speakers (ears too?) "
I think you've got this backwards. Polarity insensitivity is an indication of a problem in a loudspeaker. The problem will show up in an step response plot.
Human hearing is sensitive to polarity of asymmetric waveforms. There is undisputed scientific evidence of this. But note: recordings are not consistent as to the polarity they support and in some cases individual instruments on a track will be in opposite polarity. (One can see this with cover photos where two singers are on opposite side of a ribbon microphone with a figure 8 pattern.)
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
"Human hearing is sensitive to polarity of asymmetric waveforms. There is
undisputed scientific evidence of this"
I'm pleased to know that Tony, since I can normally sense it. Sometime back a poster said that you only hear the difference if your speaker is asymmetrical but I figured it didn't really matter to me whether it was an artifact of the speaker an attribute of my hearing since the result was the same: it was a parameter that needed to be controlled.
However I'm happier to believe that I have "normal" hearing and accurate speakers and that it's an attribute of the music (or the recording) which has always been my assumption.
Rick
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