The greatest sound quality improvement on my system was to the P20 and P20 to DSD Sr. It’s very easy to hear.
I stand corrected then. I don’t understand though. I thought the whole idea of the PP is to put garbage in one side and gold comes out the other? In that case with dirty AC, I do not see how a cord makes a difference. I guess it does. I certainly don’t understand this stuff. I also don’t understand why passive devices bring the noise floor to Zero but active devices don’t. I tested a Double Conversion UPS on my computer and it has even more noise than the PP does. Is a Zero noise floor even of importance? I have no clue about this stuff. Either one makes stuff sound better. I couldn’t say which unit is better because they are in vastly different systems. Brodric, so you dumped the P20 for a Shunyata? Which do you think is better. I have the same issue. Buzzing. Why I got the Torus for the bedroom. I am kind of guessing regeneration sounds better. Again, I have no clue. I can’t easily compare them. For one thing the system downstairs greatly exceeds the rating of the Torus. However I did notice it makes the little amp sound better. With the P20, the big amps sound better in the wall. Which is odd because I would think they benefit from more power. I wish I understood this stuff. I mean the Engineering. I know what sounds good to me.
I completely agree that on the face of it, one would have to assume that by definition, a pp would not need any help on it’s input. But I tried one of those “what the hell, I’m bored, let me try this” experiments and I put a Shunyata Anaconda on my P20 and the bass weight and bass definition improvement was impressive.
PSA or anyone if you know. Is there any advantage to using the 20A input on the P20 if your maximum wattage consumption does not exceed 7-800w max?
I’ll tell you that the P20 is sensitive to power cable input. I installed a 6gauge Shunyata that on the face of it, seems overkill, but the improvement is worth the considerable expense.
Maybe @cardri Richard can reply with his 20 amp experience. (He’s very happy with his 20 amp upgrade)
Yea I wonder if that same 6g cable would have the same effect on either 15 or 20a input if you never consume more than 800w? I have a dedicated 20amp dedicated line just don’t have 20a iec female end cable. Don’t want to use converter or purchase another cable if it will make no difference based on my consumption.
Only way to know is to try for yourself. I borrowed one from The Cable Co. Once I did, I eagerly paid for one. (my line is 15 amp)
Which Shunyata are you using? Why didn’t you go 20A?
FWIW, I tried both 20A Alpha and Sigma on the P20, and (like Ron P) found the high priced
spread to easily taste the best. Borrow and listen and decided for yourself.
There is not other than the obvious. That being if the 20 amp circuit and cable are superior to the 15 amp. In other words, if you were to use the same 15 amp circuit and power cord and employed an adapter to make the 20 amp input work, there would be zero
difference. Other than the different input AC connector on the P20, the only change is in the P20 software that sets the overload limit.
The improvement I realized going from an AC12 to the Alpha NR was substantial. The improvement going from the Alpha to the Sigma NR was more substantial.
I didn’t have a 20 amp line installed because logistically it was quite difficult and also, I didn’t want the expense of buying yet another cable.
BTW–Interesting (at least to me) was that the same upgrade on my power amp, the Alpha NR made no difference that I or anyone else could hear. But the Sigma NR was a huge improvement in bass weight and definition as well as detail and delicacy on top.
Thanks Paul. I have the dedicated 20amp circuit just don’t have a cable with 20a IEC at the moment. I was just wondering if their were any other limitations (other than the obvious) using 15a side (performance, impedance, etc…) while I work on purchasing a 20a power cable. Thanks
I saw this ad and have done my best to not buy it. I am not affiliated but it’s a great deal:
Great thanks!
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Well, I had a 20 amp line installed. I can’t afford another Sigma NR cable, so I bought a Shunyata C14/C19 adapter. The improvement is immediately noticeable. And the capacity usage on my P20 went from 51% to 27%. Well worth it. Thanks @cardri for bustin my nxxs until I did it.
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Thanks for the report. My guess is this is a dedicated line that picks off power
via a sub panel that is separate from the main panel. I am considering this and using
“audiophile” 8ga wire. My system is similar to yours and cardri has certainly
influenced me to get power right, regardless of the cost 
but happy I did.
P. S. Enjoying Windom and near a true believer but adjusting to the warmth factor.
Strange, going from 15amp to 20amp connector on P20 should have no impact on the load/utilization. You sure you didn’t leave something powered off?
8 gauge? Not easy.
#8s won’t work at the device (receptacle) end without pig tailing to a smaller gauge wire. Also, look up the termination size limit on a 20A breaker. I run a 3 1/2 ton air conditioner condensing unit off of #8 cu conductors.
The P20 is capable of delivering up to 2000 VA of pure, clean power. All of the 230V models will deliver this power using the normal 230 volt 10 amp supply cable. However in North America, the electrical building codes will only allow 1440 VA to be drawn from a standard receptacle. When using the standard (15 amp IEC C14) AC cable supplied with the P20, the maximum output power is limited to 1200 VA. You will still receive all the performance benefits of the P20 regenerator, but if your system actually draws more than 1200 VA the Power Plant will shut down the outputs in order to avoid overloading the supply from your wall.
NOTE
If your system needs to utilize the full 2000 VA capability of your P20, it will be necessary to have an electrician install a dedicated 20A circuit to feed your Power Plant. In order to comply with the North American electrical codes, this circuit should have one single (not duplex) receptacle and cannot be connected to any other devices. To connect your P20 to this dedicated circuit, first disconnect the standard 15A power cable. Slide the door covering the 20A inlet to the left. Now the 15A inlet is safely covered and the 20A inlet is available for powering your unit. You will need to purchase a power cord with a 20A (Nema 5-20) plug to match your dedicated receptacle and a 20A (IEC C19) connector to match your P20. The P20 will automatically detect the position of the door and enable the full power capabilities of your Power Plant.