Well I did It! I managed to damage my phono pre-am (sigh)

Required voltage and connector polarity (if applicable) are always indicated on devices' rear panels. That Moon phono stage is no exception; if you look, it clearly says 24VDC and the little diagram shows + at the center of the connector.

And that's what the ifi power supply provides out of the box? Yet it smoked the phono stage. Interesting

if we're sharing misery, I broke the cantilever on a brand new Hana ML trying to get the dust cap on. Sounded fine for a little while, then the sound started degrading. Thought it was my phono stage, but while fooling with it and trying different settings, I caught the needle with a knuckle (second hit). Now the cantilever was off center, so carefully bent it back...not careful enough. The sound was clear and good, but I could hear the shaft rubbing on the record. GRRR! smoke starts pouring out of my ears - kidding, was actually relieved that the phono stage was sounding good otherwise. Sent back the core to Upscale, they gave me $300 off a new one. Now just sitting and waiting until it arrives.

"but as someone that hardly ever does "tweaking" (as opposed to "twerking") on my gear..."

Please don't post pictures...

@mggartner -- Thank you for that explanation.  I'm not familiar with the mechanics behind Linear Power Supplies vs Switching.  I'll need to do research. 

@thecarpathian -- The camera breaks every time I try to document.  

There are a lot of deep-rooted audiophile tropes that heavily color the LPS (linear) vs. SMPS (switching mode) issue:

• Heavier is better. LPS are typically much heavier. Big transformers (iron, copper) and big caps.
• More expensive is better: this also favors LPS. Those heavy parts are expensive.
• Doing things the "hard" way / classic way is better: LPS
• It’s got "Linear" in its name! It must be better!

As noted, SMPS generates noise - but this noise is typically outside (above) the audible band. It could affect audible sound though "indirect" means, but there are hard to quantify. I.e. we’ll fall back onto the old tropes and subjective listening to prove LPS is better). 

Linear supplies can induce hum / buzz noises which are DEFINITELY audible and way way more obnoxious than a "hiss" or whooshing noise (like that from tubes or groove noise).

SMPS also have a huge advantage that they can work from any wall voltage. With LPS you’re typically limited to a specific wall voltage. 

I’ve heard lower power components (phono stage etc) sound GREAT even with SMPS. But yeah, the deep-seated audiophile "wisdom" in my head keeps me looking for those big and obnoxious LPS’s lol.