@jdkniepkamp Welcome to the forum! I agree! I tested the 1SPOT as well and it runs fine.
@Saki_Ciselas And with the Ciocs or the 1SPOT no electrical shock is possible. A secure solution.
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I’ll have to look at my pedal power supply. I know mine offers 9v, 12v, and 18v, but I am not sure on amperage overall though
Actually not sure.
I’m at work currently, but when I get home I’ll look at the manual.
It’s a Walrus Audio Phoenix pedal psu
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I have a Cioks and a custom N-audio power supply; I suppose combining outputs with a “merge cable” could bring enough juice
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Okay, sorry to bring this topic back in the “latest” list, but I want to share my last experiments and how the problem was solved for me.
3 different things worked completely, and only remains the normal background hum of a single coil G&L strat.
- 12V battery pack : no noise at all (as expected)
- 12V non-grounded double insulated Elektron PSU (the one from my Digitakt) : completely silent (as expected)
Both these solutions were concerning regarding safety issues. Si I tried the less expensive and most safe and effective solution other people shared elsewhere in the forum (and I deeply thank them and their patience with testing and advising) - Reamping box : completely silent, very effective, and safe.
This ugly and heavy thing solved all m’y problems :
Palmer DACCAPO – Thomann France
I tried the Dwarf with my math-rock band this week-end, this thing works! M’y pedalboard ended up heavier than I expected, but it’s worth it!
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i assume you lifted ground on the reamp box; please confirm! 
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Yes indeed
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I realise that many have waded in already on this @Saki_Ciselas, but I just wanted to reassure you that a properly designed double-insulated power supply (e.g. one that doesn’t have the metal earth pin) is designed to be perfectly safe without an earth connection (because of its all-plastic construction).
When you power the dwarf with one of these it’s the equivalent to powering it from a battery (as you’ve already tried). When you use batteries to power your other pedals you don’t consider them a safety hazard and it’s the same with the Dwarf.
When you connect your guitar to the dwarf and then connect that to an earthed amp, will you continue to get the same level of protection as if the Dwarf was not in the circuit? Yes!
Of course Mod devices can’t guarantee that any device you buy randomly off the internet will be safe - how could they? But as long as you buy a certified double insulated supply there should be no extra electrical risk at all.
If the Dwarf had a mains plug going directly in the back of its metal case it would be a very different situation, but it doesn’t - the dangerous voltages are completely separated from the Dwarf by the power supply unit, but the integrity of any earth connection between, say, the amp and your guitar is preserved by the screening on the cables connecting your gear together.
I hope that sets your mind at rest.
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Yes thanks for these precisions!
As my folks say here, I do “ceinture et bretelles” (belt and braces, if that makes any sense in english) 
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Thanks for posting back, @Saki_Ciselas. Glad it worked out.
The battery poses no threat at all.
Take the words from @ianr in full: a “properly designed double insulated” PSU should keep you in the safe side of the street. Technically, if a surge hits the grid that PSU is supposed to break down without leaking current.
Which is the chief reason for my initial post. If you have a reliable path to ground – which doesn’t have to be through the Dwarf – you are safe. Only make sure you do and don’t take it for granted. My $12 mains tester always came in handy when I was a working musician. Something like this is more than enough.
(Just don’t press the Test GFCI/RCD button. It trips the circuit breaker! I did it once… 
)
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“Belts and braces”! I love it! I’ve heard it “belt and suspenders”, but for me it’s “belts and suspenders and staple the damn thing to my waist”.
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I had a Lehle Passive split lying around and the ground loop lift switch works great!
https://lehle.com/EN/Lehle-P-Split-II
As the description says: "Another useful application for the Lehle P-Split II is as an effective suppressor for unwanted hum. "
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I’m surprised it runs on the 12v tap on a 1Spot CS 12. According to the specs, that’s only 100ma and according to MOD specs, you need 2000ma. It would be great if it works, since I already have a CS 7 on my board, which provides 200ma at 12v.
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Not sure why Truetone specifies the amperage per tap the way the do. The CS-12 is rated at 3A total for all taps combined, so the total usage of all the other devices combined must leave enough amperage for the Dwarf. I’ve also tried the CS-12 with a dwarf/duo/Sonic Research tuner/Shure wireless receiver setup and I had no trouble with that. I also had either a crybaby wah or a Morningstar MC3/expression pedal in the mix. I only used this setup for a little while at home, not a gig.
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Thanks for getting back to me! I’m going to do some experimenting today.
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This is what I’m using: https://www.sweetwater.com/store/detail/StageBug6--radial-sb-6-isolator-2-channel-line-isolator
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After thinking I had it solved only to go to gigs and find the noise still existed, I think I have found the solution: Dave Parker is right, the TrueTone CS12 works. I am powering the Dwarf (with a 12V tap) plus an Eventide H90 (on the high current 9 volt tap) and it’s dead silent at home and at gigs. The CS 12 has enough current left over to power a couple of other pedals with low current draw.
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I guess a question I have is shouldn’t Mod fix the issue that the power supply that comes with the pedal is really not very good?
In looking at options here, seems like I will need to spend just about what I did on the dwarf so far in order to get a working power situation.