What type of surge protection topology does the P12, P15 and P20 have? I currently use the incredible Zero Surge products and am curious as to what these have other than " state-of-the-art clamping devices". What does this mean exactly? MOV’s?
Also, how much heat does the P15 put off? Can the front panel display be turned off for nighttime listening? Are there any sort of measurements that you can post to show us what it does? It would be so neat to be able to see before/after with it.
Presumably not these:
Good surge protection is critical for those of us in thunderstorm-prone areas with overhead power lines.
Clamp voltages and so forth are listed in the specs section of the More Details page. We use an advanced type of MOV (there’s always a lot of research going on in MOV types) which handles about anything you can throw at it. I think your Zero Surge adds an inductor in series to slow it down which is a clever idea but not something I recommend for sound quality. In all the thousands of Power Plants out there for more than a decade we’ve never had a piece of equipment connected to one that suffered from a surge. So I think the design works well.
The heat is typically no more than hand warm though it depends on the load. You can dim the front panel display, yes. The before and after with it are available through its own metering system, and oscilloscope available on the front panel. It’s pretty clear what it does and how effective it is. But, you’re right. We should probably post some online scope photos.
Thank you so much @Paul
Does the P12 use the same engine (FPGA) as the P15 and P20? I’m trying to figure out what is really different between the P12 and P15? Even the voltage regulation on the P12 is better however, the max VA isn’t as high which is expected but the output impedance is the same too. I’m trying to figure out what the advantage of the P15 would be to me as it’s quite larger physically too.
Yes, it does. Each uses the same engine and technology. As they get bigger, the power supplies and amplifiers grow, the output impedance goes down, the performance for anything connected goes up. It really hasn’t a lot to do with capabilities for power. All three Power Plants are quite powerful. It has to do with performance and sound quality. Choose the Power Plant you can best afford. In this case the proverbial “bigger is better” applies for performance and results regardless of your system. If you can among a P20, it’s always going to sound best.
Thanks @Paul
Thanks again. While I trust you, it’s difficult as an engineer to just buy something based on verbal recommendation without seeing any sort of objective data that proves the mo’ better. 
Is it at all possible to show some data for all of us? For me, I’m just plugging in the DS, BSS BLU 50 and a pair of Class D amps to drive my JBL M2’s.
I completely understand. I’ll see what I can do. Just FYI, typically we see THD measurements on AC power of between 2% and 5%. These exist because of (mostly) the flat topping or removal of the peak of the sine wave which happens a lot because most low power factor products all draw current at the peak (as I am sure you understand). As the sine wave gets clipped the THD goes up and that’s something easily seen on the scope on the front panel of the Power Plant.
Output under loads of the regenerator are pretty fixed in a modern one at just under 0.1% regardless of incoming shape or THD.
Well, yeah. That’s my experience also, and why I was surprised to see the specs for P15 say <0.9%. A whole order of magnitude less is more typical.
Good catch. I added to the specs 0.1% typical
Again, thank you. I look forward to some data so I don’t have to ask your opinion if subjectively I’ll notice a difference even with my setup as mentioned above. 
My power varies from ~2.2%-3.5% incoming THD. Output basically tracks at 10% of incoming on the P10 output. I can’t hear the difference between 0.1% and 0.3% THD out.
I know Paul doesn’t recommend putting displays on the P-regens because of the crap they put back on the line but I run mine on it’s own zone and dedicated power cable, and simply turn that zone off when listening to music, the improvement to the video quality, colors, lack of noise can’t be overstated. If you are even a casual videophile you will be impressed!
Thanks. I’m just trying to wrap my head around whether I’m really going to “hear” it. $7.5K worth of love there? I struggle with that.
Completely understandable. Remember, PS Audio provides an in-home trial. And will happily accept the unit in return if you are not impressed.
Yeah I know but that’s so not my style.
I’m much more likely to just spend the money with objective data.
The only problem with objective data of what the regenerator can do is you likely have no context for comparison. Do you know the THD of your power now or voltage fluctuations? Do you have a heavy gauge dedicated circuit now?
I realized significant gains by running a 10awg (2 actually) circuits, and then shortly thereafter adding a P10.
As these are designed to remove distortion, one can’t know how effective it will be without knowing how much distortion currently exists, thus the in home trial.
I’m a bit confused as to how a dedicated line can improve the output of the P1x. Technically, even without the data to show it whatever you put in will come out to the capability of the P1x.
So you’re saying that Scott McGowan should have a P12 at least for his Sprout, TT and R2R rather than a dedicated line? Yes, yes I am!
And for those of you that might not know the reference…
Not exactly, the P10 essentially takes what it’s fed and improves THD by a factor of 10. The dedicated circuit reduces the chance of other junk mucking up the power, and when of sufficient gauge reduces resistance and impedance increasing the P10 (or other) ability to respond to transient demands of the connected loads.
I’d love to see real data of non dedicated line vs the same line from the same panel dedicated. In your words “reduces the chance” isn’t exactly enough for me. I’m not trying to bicker, I’m trying to really understand it all.
I watched Scott’s video and was shocked that presumabley the next CEO of PSA didn’t have a P1x in his system rather than the unsafe power strip on the floor. The P1x will likely give an improvement over the terminal strip so why not as the owners son? That shocked me more than the price of one! LOL
You shock easily.
Great pun by the way.