Line conditioner...

HELLO!!

@ebm  Oh that's nice... hello to you too!

I don't think I've read anywhere what 'dirty power' actually sounds like. I'm just interested in what the problem is that a Power Conditioner fixes... I think it's down to the amplifier designer to rectify and filter the power supply and it's not that difficult. Assuming most people here have decent equipment then I'd like to understand what the problem really sounds like.

Can someone explain what ’dirty power’ sounds like. You can short the amplifier audio inputs (not absolutely necessary as long as you remove any interconnects) and turn the volume right up and all you’ll hear is any noise from the internal components and any noise that’s made it through the power supply. I get silence (alright a tiny bit of hiss if my ear is right up against the tweeter), my house is 100 years old and wiring probably half that, all kinds of nasty stuff plugged in but no impact on my hifi equipment.

There is a slight hum at the conditioner closer than 2 feet

If that's from the conditioner itself it is likely to be mechanical, should just be a matter of finding the right screw to tighten.

Have you tried the same test without having the conditioners in the circuit? I'm genuinely interested in understanding what these things do that the manufacturers of our amps don't consider worth doing in their own power supplies.