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Posts: 12550
Location: Melbourne
Joined: September 2, 2000
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Can I suggest there are more effective things you can put between a mains-powered phono stage and the wall socket than the "active power cord" you used. IME, phono stages (because they deal with tiny signals) are particularly susceptible to power "issues" - and not just during "heavy usage" periods ... unless you live next to a machine shop which uses arc welders (which draw large currents). SMPSs (Switched Mode Power Supplies) like those which are used with routers, PCs, laptops - even some 12v devices - inject crap back into the mains, which "infects" other components that have conventional (linear) power supplies. Experiments I've done here (Melbourne, Oz) show that an isolating transformer plus a hash filter delivers the best sound: * the isolating transformer (which is able to be used because a phono stage has very low power draw) stops DC on the mains from getting into the phono stage (said DC can be created by a number of things but particularly, solar power inverters), whilst * a hash filter stops the crap generated by SMPSs elsewhere in the house, from entering the component. IMO these 2 things will do a much better job of filtering nasties out of the mains than any weird and wonderful power cord by itself - but, of course, a power cord which uses nice thick wires will be a good thing to use, too. If you were in Oz, I would sell you an Isotran (incorporating a 1 amp Schaffner hash filter) for about USD300 - I'm sure there's someone in the US who is doing what I do, for 110v power.
Andy
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