When using a power conditioner, why is it advised to run amps directly to the wall?

Please be aware that some power conditioners such as those by PS Audio Regenerators ADD noise to the line; plus other problems. Amir at ASR tested that.

I would view power conditioners rather as surge protectors, and slightly better power strips. Given that all electronics run on DC with smoothing done at rectification, I fail to see what power conditioners can possibly contribute with AC adjustments (assuming they do anything at all) in a DC circuit. 

Where I live power grid voltage can drop to 90V, so I added as voltage regulator. Needless to say, plugging an amp directly into 90V outlet is a non-starter, so has to go through the voltage regulator. Most power conditioners do NOT regulate voltage, including the Regenerators (checked with PS audio). 

Re short peaks, isn't that supposed to be addressed with capacitors in the amp? And if we assume that most of us listen at WAY below max power, and caps are designed to handle max power, then caps are significantly over-dimensioned for normal listening levels.

my 2c. 

So after much discussion,  it boils down to the adage "let YOUR ears decide".  Funny how many threads arrive at this same truth.  Cheers. 

Whether to plug your amps directly into the wall or into a power regenerator or power conditioner is situational dependent.  Hence the variety of opinions and experiences shared in this thread.  Each audiophile must start by assessing the condition of the power being received from his or her wall.  That is the fundamental flaw in the analysis reported by ASR.  Amir did not begin, or ever report on the condition of the power source that he used in his tests.  Hence his conclusions are worthless.  A power regenerator will do nothing if the power coming in from the wall is within spec in the first place.  One the other hand, if the power is subject to wide voltage fluctuations due to demand, for example in high demand locations, or if the power is corrupted by spurious noise from other users nearby, which might occur from industrial machinery, then some sort of buffer can be quite useful.  Only you can decide if the addition of such equipment is necessary or helpful.  Since each of us lives in a different location, there is no universal answer. 

I have some very powerful amps, (Michi 8) and I run them from my AudioQuest Niagara 7000 on a dedicated line. They actually sound better than straight into the wall outlet.

ozzy

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zlone’s response is unclear to me. Did the PS Audio improve or degrade the SQ from his amplifier?