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PS Audio new P15 vs older P10 Power Plant review

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A side-by-side comparison was made between the new P15 directstream Power Plant regenerator and the older model P10. Both power plants are the same size & shape, have the same number of outlets, and nearly the same features and capacity. The P15 has a number of technical updates that steps up performance even further.

- so in this comparison we are comparing apples with apples -


The P10 was formerly their top model, but above the P15 is a new top model the even bigger P20  identified by front handles, an increase in height, more AC outlets than ever, and much heavier. 

PS Audio (USA) power regenerators are top notch with a sound improvement similar to adding a new amplifier to your system.



Comparison overview - With the new P15 feeding CD, DAC, preamp and monoblock power amps (all via Valhalla2 power cables) there is a small initial sound difference and this is noted by a refinement of sound, with musical notes of more subtlety and clearer expression. Opinions are based on 0 to 50 hours on the P15 and it kept improving during ownership.

Explaining further - with the older P5/P10 regenerator one of the traditional sound virtues is a very solid leading edge to notes (no power supply sag) and this gives impressive impact, as well as being fast. 

The P15 is slightly less obvious in this impact, but it seems less is more, as the surrounding and expressive background nuances are more developed and flow out easier. 


BASS test difference - An example is from the CD ‘Best of Sade’ track 15 ‘Cherish the Day’ that has 2 bass levels as the song progresses and some good drum pitter-patter;

With McIntosh 601 monoblock power amps, I swapped over only the power cords (x2) from the older P10 to the new P15. - The BASS notes on the P15 go a bit deeper, and also the P15 is more neutral in low frequencies with a bit more surrounding information. 

Comparatively, this seems to indicate a bit of BASS compression with the older P10 regenerator. 



MIDRANGE and HIGHS test difference – I chose a CD by John Lennon ‘Lennon Legend’ track 17 ‘Borrowed Time’ – to me a sweet test track. 

(Technical – power amp cords swapped back to P10 again);

Using a Soulution 725 solid-state preamp, only the power cord was swapped in from the P10 to the P15, and I noted the music was smoother on the edges. I then additionally swapped in a PS Audio Directstream transport and DAC to the P15, and it was similar again, so the difference overall was an easier listen in the midrange and treble noting better resolution of the tish-tish on cymbals with drumsticks.



GENERAL LISTENING COMMENTS - On music that has a lot of ambience, the P15 delivers an enchanting and smooth sound that reveals echoes and subtleties. This is particularly evident on the album by ‘Lorde’ (NZ band) with album ‘Pure Heroine’. Nearly all the tracks are a good listen, with great bass on Track 3 ‘Royals’, and Track 9 ‘White Teeth Teens’ was a good listen after some familiarity.

Regarding sound stage width, depth and height, it didn’t jump out as being obviously different between the P10 and P15, so the older P10 can still hold its head high in these important areas. 


I will admit the sound system with the P15 sounded the best yet on interesting albums such as The Flaming Lips - Yoshimi Battles the Pink Robots; INXS, War on Drugs - a Deeper Understanding; the Cure - Disintegration.


In a blind test with say some listening fatigue after an hour going back and forth, I feel it would be a challenge to reliably pick the Power Plant regenerator in use as its not night and day change, even though there is a difference in favour of the P15 with subtlety and nuances and an easier music flow.



Chassis / Casing - the setup and features are much the same, but there’s a bit of difference as the P15 touch screen is even bigger, has sharper text, and a feel closer to touching glass. Comparatively, the P10 has a more traditional liquid crystal touch screen. 

One new setup refinement aid is an ‘auto tune’ button for Phase Tune. Previously you had to listen hard to determine a best number between -10 and +10, so now by pressing the ‘auto tune’ button its easy – the unit selected -4 most times I tried it. 

The rear of chassis is functionally the same, but has layout improvements such as the 9 outputs being mounted lower down on the chassis. 


In summary, we are talking say a 5-10% difference centred around the system being easier to listen to with improved clarity, resolution and transparency of the P15 that grows on you as the hours clock up. You can turn the volume up more on your favourite tracks, and edgy recordings are an easier listen. Being easier on the ears is a very desirable benefit especially in an ‘all solid-state system’. And yes, I bought one.

For people that haven’t experienced the older P10 it’s still a seriously good power regenerator, and such is the demand I sold mine within 24 hours.


Anthony H.  Sept 2019

P10 left vs P15 right.jpg

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Great read Anthony, thanks for taking the time to write about your experience 👍

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Thank you for the comparison review, looks like I’ll keep my P10, doesn’t seem to  be enough improvement to justify the cost of upgrading.

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1 hour ago, awayward said:

Thank you for the comparison review, looks like I’ll keep my P10, doesn’t seem to  be enough improvement to justify the cost of upgrading.

Might be worth reserving judgement until OP's P15 has more hours on it.

Hopefully he will post again in the near future with an update....?😉  

Edited by JohnL

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Nice work - thanks for doing.

About to start a rebuild / review of my system starting point is the introduction of a PS Audio power plant..

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COMPARISON UPDATE - Being the original thread poster, maybe I'm a hard marker, but the original thrust of the comparison article with the new P15 vs older P10 regenerator still stands. Yes, the new P15 is very good, and with hundreds of hours on it now, maybe up to a 20% improvement over time as the refinements are appreciated. Percentage figure wise, it really depends how an individual measures/rates subtle changes.

The older P10's reputation still stands very high as it will always be a game changer for people wishing to experience the clear audible benefits at a cost saving by buying 2nd hand.

I've read overseas reports where they think the update is hugely different, including PS Audio advertisements, but the reality is it's an incremental refinement over its predecessor, based on updated electronic design, parts selection and control processing. And this is always welcome.

As I often listen to equipment in shops it's a noticeable difference when the power supply is not treated, eg. subtly annoying on the ear - but with a recent exception - an American VTL tubed pre and power amps driving the big UK Tannoy Canterbury gold reference speakers, now that was heaven.


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Great input Anthony. I use the P10 with the main aim to keep a constant 230V running through my equipment. Have you gone back to wall plugs to hear the difference without the regenerators??


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Wall plugs answer - There’s no going back .... Typically equipment with reasonable transparency will sound less energetic from a wall socket especially noticeable on initial strike of a note, and after you get a handle on things you will notice a noisier background.
That said, when most/all components are plugged back into a regenerator or equally well a quality filtered product, the whole tone of a system goes up quite a notch and is far more enjoyable as you will be able to follow individual instruments much easier. Hence why myself and others say sound wise it’s like connecting in a new amp.

You might have experienced a similar effect with above average equipment using a standard power cord into the wall, and then you plug in a HiFi special.
By comparison a standard cord can be unlistenable due to a frequency mess even to the point of not wishing to turn it back on. I experienced this a while back with a Mark Levinson amp that demanded a HiFi special - it showed me the weak link.
However with a friends Cambridge stereo amp I tried out a Nordost Valhalla2 power cord expecting a massive improvement but alas it was 10% better and this indicates at least the amp had a very good power stage design.
On a Krell 400xi stereo amp the V2 power cord improvement was 80% better.
So the level of improvement/effect is equipment and listening space dependent.

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@Anthony1 Just wondering if you have had experience with changing fuse in the PS Audio (either P10 or P15).

I've tried playing with a few fuses in my P10 and all resulting in slightly different flavours.

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That's @cyberkank for bringing this up.


I'd also be interested in experiences with changing fuses on the P series range of Power Plants. There are two on my shortlist:

  • Synergistic Research orange fuse (will be released in about a week or so)
  • Audio Magic Ultimate Beeswax SHD

@Anthony1 thanks for your very comprehensive and informative comparison of the P15 vs P10.

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Thanks for this thread. I found it very useful.

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@Ed Sky i recently update my p20 with the Synergistic Research orange fuse and for the money a good upgrade - needed a few hundred hours and out the the box was a little disappointed better not to listen but things certainly got a lot better.


Benefits in my system and i did do my PS DAC as well (same time)


  1. improved sound stage ( little more cleaner depth)
  2. Slightly improved bass
  3.  bit of the brightness i have at the top of my system seem to sort it self out a little better. 


very good upgrade for the cost

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@tdk  yes & Yes -


Syn actually tell you the following


Q Do fuses have a burn in period?

A  Yes, most products have a settling in period.  The first 200-300 hours of use are the most crucial.


and they are pretty right = apparently they are directional but might leave them for a while before i go down that rabbit hole


given the P20 is feeding my system felt it was a very good upgrade these aren't cheap around $240 each - and they have to come in from the US  but for the dollars spent certainly heard improvements in my systems.



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@Gwhitten thanks for the feedback, good to know. I’ll be getting Orange fuses in the next few weeks. What spec fuse did you get for the P20? I know the distributor said it takes 5A slow blow small fuse. Some people go up one notch on the amperage rating so the fuse is less prone to blow prematurely.


Definitely experiment with the directionality of the fuse. While it sounds very far fetched there is a distinct improvement with the fuse in the right direction. You will hear more detail with the fuse in the right way.

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9 hours ago, Ed Sky said:

I know the distributor said it takes 5A slow blow small fuse. Some people go up one notch on the amperage rating so the fuse is less prone to blow prematurely.

Would be very careful about this and replace like with like fuse in terms of specifications. Otherwise you are asking for trouble big time


ps: very much into fuse upgrade on my equipment as well with definite sound improvements. 

Edited by Neo

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totally agree with @Neo Paul, Ted and the PS Audio community don't recommended up sizing no benefits and opens up to damage on equipment which can become a costly exercise 


enjoy the fuse a great investment 

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