This is how I placed my GP. The GP doesn’t actually care too much about where he stands. The EMI protector should be placed between or the speakers if possible. As I understand it, it would be optimal to set up the EMI protector a little higher. 1.10 meters was mentioned as the optimal height. If it is a little lower or higher, it would still work.
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Following Andreas last post, I tried moving the GP to different positions behind the rack. Inadvertently the Schuko plug happened to loose the PZ’s outlet during this operation, just right I was listening to possible differences in sound.
I was thinking there was something wrong in the presentation, the sound suddenly became less realistic and too much edged, voices appeared like if a reverberation filter was applied and bass were a bit louder and less clean. I had the impression that the power switch (central) in position I was bad, bringing excess of transient and a bit of fatigue while in position II was bad in another way, bringing congestion in mids.
When I moved the GP to its original placement, behind the rack on the floor close to PZ, I finally discovered the loosen Schuko plug. As soon as plugged it back into the PZ socket, oh well… how immediate was the difference. A general feeling of relaxation, all was immediately opened up and that kind of “being-there-realism” reappeared in a perfectly natural presentation.
Conclusion:
- the switches seem to do something even if the GP is not working on the electricity being its Schuko plug disconnected from any sockets, so it can act as a light EMI Protector via antenna. I didn’t like it in that scenario though. Does it mean something?
- the improvement brought by the GP is significant in my system, no matter how the 3 switches are set (that is mandatory to fine tune the sound by ears), but this device seems to really work well in my room
- once again, when the GP was unplugged from the PZ, I was able to hear the subtle mechanical buzz from the amp, just in a dead silent environment but slightly audible. It means that this device is effectively doing something to the electrical current around my system.
As always these are my thoughts necessarily influenced by my own system, environment and electrical power, you may find different results in yours.
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Well think this is something that is interesting to think about too.
I think it is weird that you plug the GP into the PZ when the instructions say not to do so. Are you in on a secret? Have you tried plugging the GP into an outlet not on the same circuit as the PZ? I will easily be able to try both.
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Schnerzinger recommends not to plug the GP into a power conditioner or regenerator (where filtration is enabled through capacitors and other stuff like that).
We know that the PZ is a different beast and it doesn’t work like a conditioner/filter. I asked Paul Hafner and he confirmed me that it could be a possible way to go.
Yes, I tried the GP connected to a wall socket vs the PZ, I prefer the latter. It seems able to enhance the beauty of the PZ in comparison.
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You make me want to free up a socket.
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Curious, what’s the cable length for the two power cords that come with the Grid Protector?
The unit’s power cord and the 12 volt wall wart.
They seem to say to put the wall wart power supply on a different circuit and to me that means a pretty long cable to allow the flexibility.
Interested to know the unit’s power cable length, again to ensure placement flexibility.
I guess both 1,5-2 meters, if needed I can measure them.
The more I listen to, the more I think the GP is complimentary to PZ. It makes me feel confident that all the PZ happy owners (who generally benefited from it even if in different systems) could achieve similar improvements.
We can’t say that for sure of course, at least until others (and our mentor in particular) will have the GP plugged into their own PZ.
My friend, I can only wish you to get even a fraction of what I’m getting now because it’s really nice!
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Thanks Luca, approximate length is sufficient.
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Are there unhappy PZ Owners?
Maybe those who are waiting for a delayed shipment?
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The power cable on the Grid Protector is quite long. An extension cable is included for the external power supply. If the length is relevant here, I would have to measure it.
I’m happy with Luca’s reply of the approximate lengths.
Thanks.
My cables are definitely longer. I’m guessing about 4 meters of power cable. 1.5 meters on the power supply + 4 meters extension cable.
Since I still had an IFI DC Purifi2, it now supplies the GP. 
To be sure I’ve just measured them:
- the wall wart 12V cable is 1,5 mt
- the Schuko fixed cable is 2,5 mt
Hope that helps.
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Do you have both connected?
After Luca measured, I was curious because I thought the cables were very long. My fixed 230V cable measured at the GP: 2.80 meters Plug-in power supply: 1.5 meters Included 12 V extension cable: 3.0 meters
I think the cables are long enough for most applications. Personally, I wonder if the GP’s 230V power cord even needs to be that long. Would it make a difference if it was shorter? The long cables are an advantage because I can place the GP next to my listening chair. This way I can play at the counters without getting up. 
I connected the GP’s 12 V power supply using iFi Purifier 2. I didn’t have to buy anything, I still had an unused iFi. I’m not Luca who leaves things like this in a drawer. 
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