Sure, please do
I just plugged in the iDefender+ 3.0 firstly, whilst in-game (buzzing was there, of course - my USB DAC requires power from the USB line), there was a decrease of the buzzing etc,seemed to faintly reduce the loudness of it.
So I attached my/the iPower 5V (not the iPower X), using the provided adapter, into the side of the iDefender (while the iD. was unplugged from the computer, but the iPower plugged into the power strip I am using), and heard that pop sound you get when you plug in or unplug stuff from speakers, through my studio monitors, which were still on during the first test I described in the previous paragraph - sounds like something was isolated perhaps? So I then insert the iD. with the iPower + adapter, etc, into the USB socket in the back of my desktop PC whilst still in-game, and oh my dear lord, the buzzing has been completely eliminated. I mean completely. Somebody call the cops because ground loop hum has been murdered (with the iDsD BL it has been reduced by about 50-75%).
Sweet so that above is all done through the audient EVO 4 USB DAC, which is only about 220NZD, yet pretty good for what it is I suppose.
Although, I also bought a micro iDSD black label, which I am about to hook up.
Not sure how many pairs of underpants I will go through in the next few minutes; the iD. with the iPower has already cleaned up the audio output, but I will report back again, surely enough..
EDIT: So the micro iDSD BL is pretty disgustingly good, god damn.
When I picked it up from my store, I realized the provided RCA cables will be too short to hook up to my studio monitors, so big Manu over the counter recommended some Luna 8 RCAs (male to male) - however my monitors now pick up some sort of high-pitched tones that seem to stop and start every 10 seconds or so. I am using the iFi-provided blue USB cable with the iDSD BL plugged into the back of the iDefender+ (that has an iPower plugged into the side to feed the iDSD BL), which is plugged into the USB socket in my desktop PC (Windows 10).
I'm guessing this is electrical interference of some kind? Lol, what do I do now, it is not exactly a problem if the faders on my monitors are low enough (the idsd BL can power them easy), but I'm wondering what would eliminate this? iSilencer, a high quality USB cable, RCA to TRS adapters at one end of the Luna 8 RCAs, micro USB?