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Old March 21st 06, 07:47 AM posted to uk.rec.audio
Jim Lesurf
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Posts: 3,051
Default Mains filter test results

In article , Glenn Richards
wrote:
Roderick Stewart wrote:


"I then switched the power cable on the amplifier to use the Isotek
cable. Immediately there was an improvement in dynamics, percussion in
particular had much more presence and depth".


Which would make perfect sense, as by taking out RF interference what
you've done is lowered the noise floor. You may not be able to hear RF,
but if your amplifier is trying to reproduce it then it's increased the
noise floor, which will result in the dynamic range of the system being
reduced.


You give no explanation of how the amplifier would be "trying to reproduce"
the RF and this then leads to it "inceasing the noise floor".

Thus you make a speculation, but give no mechanism.

Nor did you report any measurement or period of listening that showed that
you could detect a change in the audible noise floor. If this was occuring,
it would show most clearly when you were not playing any music, and the
effect would then be obvious if it was occurring.

Thus you did some 'tests' but obtained no evidence that the effect your
speculation assumes actually occurred.

Slainte,

Jim

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