Still waiting on the cheapo 24V PSU recommended earlier in the thread to arrive from China, but I don't know if it's going to get any use once it finally arrives. Bloom Audio had a flash sale on Monday for 15% off iFi iPower Elite units, so I grabbed one of the 24V models and it arrived a little while ago. I've had the RNHP hooked up and warming up a bit and initial impressions are very favorable.
- Bass is noticeably tighter, deeper-reaching, and punchier.
- There's an incredible depth and sense of three-dimensionality to the soundstage
- Microdetail across the board, but especially in bass notes, is much more apparent
- Vocals sound clearer, hell EVERYTHING sounds clearer and more realistic, with greater weight and texture to instruments and vocals
- There is is much better separation and air around instruments; the soundstage is definitely wider, deeper, and taller than before. The RNHP was no slouch here to begin with even with the stock power supply, easily besting my E.A.R. HP-4 with Sophia tubes, but it's much improved now
- Treble in general, but cymbals in particular are sharper (but not in a bad/painful way) and more detailed. Sometimes (recording dependent), cymbals could be so brickwalled they sounded more like static or white noise (2022 re-recording of Four Year Strong's Enemy of the World, for example, but that is greatly improved. The cymbals are still brickwalled, but there's much more cymbal than static now)
- Distorted guitars have some extra bite/crispness that wasn't there before
Music sounds much more alive now, less like a recording.
I'm listening to select tracks from the 24-bit Definitive Edition remasters of Nine Inch Nails' albums,
The Downward Spiral and
The Fragile. The intro dueling bass synth lines of "Heresy" have never sounded so tight and detailed, not even on my speaker system. Panning during "Closer" keeps giving me goosebumps and it sounds like things are floating around my head and behind me during the crescendo. During the solo/interlude of "Ruiner," the bass sounds like it is behind and below me, rather than just off to the right. "Somewhat Damaged" sounds incredible; the many layers that buildup as the song progresses remain distinct and even better separated than I've ever heard before. That song gets extremely congested and lesser gear just makes that sound like background noise/static, but I can hear the individual pieces like never before.
Honestly, the change is reminiscent of the HeadAmp Gilmore Lite Mk2 before and after the Golden Reference PSU upgrade came out. The differences are subtle but substantial and definitely noticeable if you pay attention. But this amp is in another league compared to the GLMk2.
It'll be interesting to compare to the other, cheapo upgraded PSU w/iFi DC purifier. I'm betting the difference between that and the iPower Elite is going to be minimal, but maybe not. Tough to say at the moment that it's worth spending $300 to get the Elite, not having directly compared the two options head on yet, but I can say for sure that I am VERY happy with how the amp sounds now being fed by the iFi iPower Elite 24V PSU.