With all the controversy surrounding the measurement of the P12 Power Plant we thought it useful to show how the measurements for output impedance, distortion, waveshape, etc. are properly made. Who best to show us than the Power Plant’s designer, PS Audio’s Chief Engineer, Bob Stadtherr. In this vi…

The output shown in the right graph is lower, especially the harmonics of the incoming 60Hz. This demonstrates the Power Plant is doing what it claims to accomplish. Critics however maintain the high frequency noise should not be present, assert this noise indicates the Power Plant is not a “real”…

I would appreciate it, too! Thanks.

From a friend and it is appropriate here: It seems like almost everything involved in high end audio is designed to actively remove any enjoyment involved in listening to music. I guess we should enjoy the shred of a percentage that isn’t “almost everything”.

@Shazb0t I think Paul has already addressed the HC outlets. The P12 circuitry under normal operation switches out the current limiter via a relay. And I can accept that. However, as with all used equipment being tested, who knows the history of the unit sent to ASR. It appears that it needs to be in…

Regarding the PowerPlant’s ability to attenuate AC line noise, particularly higher frequency spectra, please read my posts in this thread, “Power Plant and Noise”, starting from this post: [image] Power Plant and Noise Power Components AC regenerators (essentially power am…

And… especially the thread “Powerplant Peak Current and Noise Filtering Capability” mentioned on this post: [image] Power Plant and Noise Power Components Very interesting information on the Powerplant’s AC noise attenuation/filtering abilities - Paul says that PowerPlants…

Your observations are one of the reasons I already linked this entire thread a few posts up.

@John_H There are benefits and drawbacks to any design topology. If you want pure isolated Class AB regeneration, it comes at a cost (literally) of efficiency.

Thank you, Elk! Thought I’d provide everyone a few more specific pointers :wink:

Absolutely appropriate. :slight_smile:

Here's the correct way of measuring a Power Plant

Power Components

John_H March 27, 2022, 2:38pm 319

And… especially the thread “Powerplant Peak Current and Noise Filtering Capability” mentioned on this post:

Topic		Replies	Views
Bad review of PS P12 Power Components	708	16931	March 11, 2022
ASR: Impact of AC Distortion and Noise on Audio Equipment Fidelity Power Components	89	2799	August 18, 2021
From Stereophile.com 4/2/19 Power Components	32	2541	April 12, 2019
Power Plant and Noise Power Components	90	8944	July 18, 2023
Anyone experienced a regenerator making their equipment sound worse? Power Components	112	2814	August 29, 2023

Here's the correct way of measuring a Power Plant

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