what does a power conditioner really do?

I started ac conditioning with a monster government military surplus 300 pound transformer. It helped but was noisy. Since then I have had over twenty devices, some worked a little, some did nothing, some had liabilities, some were beautiful, some were regenerators, and the High Fidelity Waveguide power center which uses magnets to get the junk off the line.

It looks like a toaster oven, but it really works. 

Have you tried the High Fidelity Waveguide ten outlet prototype that has been upgraded to present standards. It is the magnets that result in its performance. 

I have never heard the Elgar but the HFC outperforms the other 28 power conditioners I've used.

I must say that the HFC benefits from pcs to ics to speaker wires all come at great expense but are also unrivaled.

@cousinbillyl 125V is perfectly reasonable.

115V is just what they call "Nominal" or "named" voltage. Equipment manufacturers must build to long term use up to 130V, I believe.

When we first moved into our house the voltage was 125.5 volts at all times. I borrowed a chart voltage movement. Then there were few houses around and our city's population was about 60K. Now it is 117K. The voltage now is right at 117 volts. 

I have a prototype of the HFC Waveguide Power Center. It has been updated to current specs. It keeps electromagnetic waves from getting into the components. There used to be much modulation on my ac but now there is none.