Line conditioner...

Look at High Fidelity Cable conditioners

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.

pragmasi- Can someone explain what ’dirty power’ sounds like.

Yes but its better if you hear it for yourself. Its easy. Get your system all nice and warmed up some night and listen to your favorite music. Then pause, go out to your breaker box and flip off a bunch of breakers. As many as possible just be sure to leave the system on! 

Go back in and listen again. Pretty dramatic, eh? So now you know. And if you find a good power conditioner that is exactly the kind of improvement it will bring. BUT even with the best conditioner and a whole slew of excellent power cords and whatever else you can get your hands on it will STILL sound even better when you go out and do the same flip the breakers trick. 

Read the other 20 threads as well.HELLO!!