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Here is a post that challenge the claim; ferrites on mains cables will affect high frequencies.

To be honest, it seems more than a little unlikely given they are talking about ferrites on the power cords. The suggestion is contradicted by the method of operation of the power supply and the circuits themselves. Audio equipment is almost always DC powered internally, it's frequency response is derived from the operation of the circuit, not the frequency of the supply.

Consider a "perfect" ferrite that removed all 'HF garbage' above 50/60Hz - what you'd be left with would be pretty much the theoretical ideal supply of a pure sine wave. The claims seems to suggest that this will sound worse. Rather an unusual claim don't you think?

If there really is such a dip in HF response with ferrites on the power cord, it will be utterly trivial to demonstrate with a frequency repsonse measurement. That no-one does so is rather telling.........

Ã¢â'¬Å"TNT TTS Mains CableÃ¢â'¬Â thread at HFC Forum
http://forum.hifichoice.co.uk/viewtopic.php?t=10569&postdays=0&postorder=asc&start=0
May 18, 2004 by Adb

<blockquote data-quote="BlueMax" data-source="post: 510445" data-attributes="member: 1226">Here is a post that challenge the claim; ferrites on mains cables will affect high frequencies.To be honest, it seems more than a little unlikely given they are talking about ferrites on the power cords. The suggestion is contradicted by the method of operation of the power supply and the circuits themselves. Audio equipment is almost always DC powered internally, it's frequency response is derived from the operation of the circuit, not the frequency of the supply.Consider a &quot;perfect&quot; ferrite that removed all 'HF garbage' above 50/60Hz - what you'd be left with would be pretty much the theoretical ideal supply of a pure sine wave. The claims seems to suggest that this will sound worse. Rather an unusual claim don't you think? If there really is such a dip in HF response with ferrites on the power cord, it will be utterly trivial to demonstrate with a frequency repsonse measurement. That no-one does so is rather telling.........Ã¢â'¬Å&quot;TNT TTS Mains CableÃ¢â'¬Â thread at HFC Forum<a href="http://forum.hifichoice.co.uk/viewtopic.php?t=10569&amp;postdays=0&amp;postorder=asc&amp;start=0" target="_blank">http://forum.hifichoice.co.uk/viewtopic.php?t=10569&amp;postdays=0&amp;postorder=asc&amp;start=0</a>May 18, 2004&nbsp; by Adb</blockquote>

[QUOTE="BlueMax, post: 510445, member: 1226"] [COLOR=Navy]Here is a post that challenge the claim; ferrites on mains cables will affect high frequencies.[/COLOR] To be honest, it seems more than a little unlikely given they are talking about ferrites on the power cords. The suggestion is contradicted by the method of operation of the power supply and the circuits themselves. [b]Audio equipment is almost always DC powered internally, it's frequency response is derived from the operation of the circuit, not the frequency of the supply.[/b] Consider a "perfect" ferrite that removed all 'HF garbage' above 50/60Hz - what you'd be left with would be pretty much the theoretical ideal supply of a pure sine wave. The claims seems to suggest that this will sound worse. Rather an unusual claim don't you think? If there really is such a dip in HF response with ferrites on the power cord, it will be utterly trivial to demonstrate with a frequency repsonse measurement. That no-one does so is rather telling......... Ã¢â‚¬Å“TNT TTS Mains CableÃ¢â‚¬Â thread at HFC Forum [URL]http://forum.hifichoice.co.uk/viewtopic.php?t=10569&postdays=0&postorder=asc&start=0[/URL] May 18, 2004 by Adb [/QUOTE]

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