Did anyone return a PSAudio Powerplant? Why?

I had one and had to send it back to PS Audio for service, and it was probably around 10 years old at the time, but I really don’t remember for certain. The problem it had was something pretty common to older units from what I do remember. Something to do with the display and something else I just don't recall. Anyway, they brought it back to as-new shape with warranty for a reasonable cost. No complaints.

I have a Shunyata Denali 6000S V.2 .. System uses all Shunyata power cords too.

@nyev 

Take everything you hear from ASR with at least a pound of salt!

All the best.

@curiousjim 

I didn’t hear anything from ASR, loll….
 

It was Paul of PS Audio who agreed that Power Plants increase noise (“this is absolutely true”), in one of his videos.  He then explained that Power Plants offer a benefit not by decreasing noise, but by reducing impedance which allows for a stable sine wave when your amp is drawing current.  He makes the case that we shouldn’t be concerned about noise.  
 

Paul’s YT Video

 

I tried a PSA Stellar PowerPlant 3, but eventually sold it.  I actually had an entire PSA Stellar stack.

Anyway, I was looking for AC mains noise reduction, which the PP3 did not provide (as already mentioned by others here), so I let it go.  What really helped me with noise reduction was a Puritan PSM156 power conditioner.  I checked results with a simple EMI noise meter, and the difference using the Puritan conditioner was measurable.  The Puritan also touts blocking DC, but I think you have to have quite a bit of DC present in order to notice a measurable difference.