If you completely remove the GP from the room? No SMPS, No fixed cable, no little black box in the room.
I found that my GP helped reducing mechanical buzz from the amp, even if it was already very very subtle before. Wherever I place it.
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It was just odd. When I originally placed the GP on the Apex I put it there so I would have easy access to the switches. You suggested it move away and be placed higher. So I did that but before I could listen my left ear went silent. So last night was my first listen. I had never heard any hum whatsoever from the Apex but last night it was obvious. Odd. I don’t need or want hum.
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What is the function of the Multiguards in connection with EMI?
Having told me that you had put the GP on top of the Apex my first concern was about temperature, this is the reason why I initially suggested a different place. Then I experienced in my room how elevating the EMI can provide huge improvements so I still suggest you to do the same.
This hum issue, mmm I don’t like it. I really don’t like it.
More than the black box placement, I’d double check the power cords, the run, the plugs and sockets where you are plugging in the SMPS and the fixed cable. But first of all I’d try to find out if the hum is still persistent from the amp when the GP is completely removed, I mean black box and cables away from your room.
Is the GP the culprit in your opinion or other components/cabling/gremlins injecting DC into the grid for instance? Have you already used at maximum load the Apex recently?
Al…Gryphon states that their amps can and do create transformer hum and that it is normal. My 300 has a very faint transformer hum. Not enough to bug me though.
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Thanks Mark. I have had the Apex for over a year and hum appeared suddenly. It seems gone now. I will try a few things to attempt to rid it for certain.
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Good luck, keep me informed
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If the hum and buzz remain, the only remedy is to get rid of GP (I assume you want to keep Apex).
I must risk my sanity to try the GP sorcery (from your garage sale) to find out if it hurts M1200.
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Now you tell me that we might experience a hum in the rabbit hole. lol
Good luck with your tweaks.
Also the GP largely benefits from the elevated placement, I’ve just tried it 40 cms from the floor, placing it on my low rack upper shelf.
I’ve just ordered stands from Amazon to elevate both GP and EMI, curious to hear what happens…
@aangen any news about hum issue and what was causing it?
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Interesting that the GP benefits from being raised off the ground.
Mine is sitting in four Stack Audio footers on the floor.
Looks like I’ll need to find a higher vantage point for it.
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Great, now both needed to be raise higher than the top level of the rack. Wait, that’s a good news in my case since that will never happen in this house.
I think the additional shelf behind your rack, where there are SW switches, should be a perfect place indeed.
Compared to Schnerzy stuff, the Origin B2s impact is an infinite fraction. And I still like them, but now we are playing in another league.
It’s not the right time for you, I know. We will talk again about it later next year, after Japan trip…
PS: you have to convince your wife to schedule a trip to Italy sooner or later!
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I thought you were Captain Kirk, but now I know you’re a captain from a Borg ship😆 I’m very afraid that I’ll be assimilated by you one day. Water molecules and now radiation control, and this hobby is getting stranger everyday.
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You discovered me, in fact I’m fascinated by the “black cubes”
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Maybe in the near future there will be a few small boxes that can outperform Origin B2. 
And also boxes that can challenge the SR Blackbox. 
The rabbit hole seems never-ending. It will also be interesting to see whether the Gryphon Powerzone loses its dominance. Furutech Vault or Schnerzinger Allucator are hot favorites. 
Luca, I heard you’re getting an Allucator.
And I look forward to your comparison test.
It will be exciting.
Greetings Andreas
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Nope. I am giving up on all this audio stuff. I am going to focus on cartoons until the apocalypse arrives. Plus, I got a new CPAP machine that allows me to sleep for 14 hours at a time. With the stock power supply and cables even! Sadly it is unfused.
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Luca … can you expand please how the GP benefits from being lifted off the floor?
Tomorrow I should receive two stands from Amazon, in order to have both GP and EP elevated behind the rack on the front wall.
In the meantime I tried only the GP at 40 cms off the ground, it’s pretty easy to hear a beautiful sound improvement in REALISM, the camp usually managed by the EMI. My guess is that the Grid can act also like a “little EMI” in some ways.
Realism means IMO a crystal clear and vivid voice, vivid and smooth without sibilance but most of all incredible intelligible (I’m able to better understand the singer’s words for instance). Same thing with some instrument, acoustic strings mostly, like if the depth proportion of the scene in front of me was easier to grasp. Palpable being there feeling.
My son plays guitar 24/7 at home since years, both electric and acoustic, believe me if I say that I know how this instrument sounds in a room.
If the EMI is able to give this beauty, I’d say that also the (elevated) Grid Protector can contribute at 30% in comparison.
What are you hearing if you elevate yours?
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