Thank you, I am familiar with a number of standard engineering terms. Voltage is often expressed in RMS, as is current, but "RMS power" is not a real term. And the discussion regarding limiting the output power is related to the DC voltage across the output devices, typically a positive and a negative voltage rail, derived from the wall inlet by whatever means. The specifics of the means of creating the DC rails is what determines if a 5% drop in wall voltage leads to a 5%, 10%, or some other change in the DC voltage across the output devices.A standard engineering term:Root mean square - Wikipedia
en.wikipedia.org
For the standard old linear supplies a 5% drop in AC ( 120V RMS ) will drop the rails 5% which will drop the power out 5% . Of course if you use a different supply topology this may be different.
None of this debate applies to SMPS power supplies which are regulated by design.
I also have a basic familiarity with physics, efficiency, and the laws of conservation. I do not recall ever saying they create energy. I do not follow the argument about output impedance rising when mains voltage drops slightly, that is normally determined by choices in devices, bias current, and feedback, but apparently I do not understand basic electronics as well as you.
Touchy. I never said you. And I never said RMS power, only RMS voltage. I think basically we are saying the same thing.
Exactly - the people who buy them don't do so because they have some edge-case situation with their mains supply, they buy them because they think veils will be lifted.Regardless of the semantics over a .9 reduction in dB with a mains power drop, the claims made for this device by the manufacturer are:
"The results of feeding your equipment with low output impedance are dramatic: unrestrained dynamics even under the loudest passages, an open, wide soundstage that does not collapse with volume and a naturalness to the music that is remarkable. "
PowerPlant 12
The DirectStream Power Plant 12 features an all new analog power amplifier and FPGA sine wave generator based on pure, clean, analog DSD (PDM). The P12 is our most powerful compact regenerator with 1250 watts of pure power. From medium to large power amplifiers to the smallest pieces of source...www.psaudio.com
How does this "remarkable" improvement relate to the output impedance of the mains supply to an amplifier power supply? Short answer is "it doesn't!" Even if it did, the makers of this product should limit their claims to the only obvious effect of this machine which is that *possibly* it will mitigate a drop in mains voltage which would reduce the output volume of the amplifier. That is all, no "naturalness" no "soundstage" just perceived volume.
No worries. Yes I should have said RMS voltage and peak voltage not just RMS and peak.
