Hey NYC,
So after all of my troubleshooting, spending, and aggravation; I found out what was up.
I have a damaged PSU on my mixer.
I just did a few tests, only to find out that the dwarf wasn’t the culprit.
I returned most of the gear I purchased to rectify the issue on my end.
I’m virtually noise free in my use case.
I will pick up an amp from my FIL to see if I can replicate your issue and begin the troubleshooting the best I can.
Amazing @Elk_wrath , congrats! And good on you for returning all that stuff.
Looking forward to hearing how it goes with the amp, and thanks again for keeping me in the loop.
Since you asked for details on the setup that is working in the recording scenario for me, here you go, hoping this helps you and others:
The iDefender+ definitely killed most of the noise, although there’s still some bleeding through. Will report back on the new power supply recommended by @Elk_wrath
Thank you so much 
Do you have any other setup where it is not working? I would say even if you keep the exact same settings on the Dwarf (Input and Output gain) you get more noise?
The recent gig I brought the Dwarf to had the following:
I also tried it on the following setup in a rehearsal studio:
In both instances I plugged the Dwarf output 1 directly into the amp head. First, there was an annoying static noise, but then it was accompanied by a higher-pitched noise the likes of which neither I nor the sound techs could quickly identify. The second noise might be what others have described here as a “digital” noise. The overall noise level was severely worsened when I switched from passive to active pickups on my bass. In both the first and second trials I had no time to do diagnostics, I just needed to start playing. So – the Dwarf came out and the bass went direct.
Hope that helps.
A lot 
Thank you
And just for the sake of collective information sharing - I bought a 12v 2A power supply- linked below - and it both works great and gets rid of the noise/hum/whine - it’s solidly built too so a good alternative should you need one
I’m so psyched… quick update. Replace the stock Dwarf power supply with the one @Elk_wrath recommended, removed the iDefender+ and its separate power source and the noise is GONE in my recording setup!!! Yup, gone. Now I have a more streamlined solution for recording.
Next is to test the new power supply + Dwarf + my active bass with a real amp, which I’ll try to do this weekend at my local GC.
@Elk_wrath , a huge thanks to you.
My man!
Heck yeah!
I’m super stoked that worked for you, and that your issue is partially resolved.
Let’s hope it works like a champ in your amp set up!
Throw some love to @ianr as he recommended the PSU type, I just found a US based plug instead of the European style!
Can’t wait to hear some of your jams!
Oops - I meant to reply to this one earlier.
Double Insulation only applies to mains-powered devices. The Dwarf doesn’t have mains voltages in it - it just gets 12v from the power supply so it’s safe in that respect.
Glad things are working well for you SillySovietNYC!
Went to my local GC, plugged into an Ampeg SVT head with a 4x12 cab and – no noise!!!
Will report back on any other amp / live settings I’m in, but for the moment, I’m so psyched to Dwarf the future LOL
Yeeeeaaaahhhh Buddy!
Super glad you are up and running, and most importantly, happy with the solution.
Rock on!
Was that with the stock power supply?
Heck no. I threw that thing away. That was with the $12 power supply mentioned earlier, the one @Elk_wrath posted. Works like a charm
Had the same Noise-Problem with my DuoX. Got myself a “Dehner Tischnetzteil ATS 036T-A120 12V/3” @ CONRAD Electronics Germany, 19€ (living in Dresden) and that made any noise disappear!!!
New and wunderfull world of pur sound;) :)
Using the DuoX in my elctronic setup, with non-symmetric Cables and without a DI-Box.
so, basically the solution is to change the Power Supply to a 12V 3A one instead of the 12V 2A one that comes with the Dwarf?
Not necessarily.
I snagged 3 amp because there weren’t any 2 amp models at the time.
The biggest thing to look for is a double insulated non grounded plug.
I swapped mine out for a 2.5A 12V, got my wife who used to be an electrician to shorten up the lead so it is a straight run to the dwarf, fixed the problem in an instant.