I recently picked up a new Utopia 2022, and after a brief demo on my GS-X Mini, wanted to formally demo it across a few of my amps to find the best synergy, including the revered Nitsch DSHA-3FN, Headamp GS-X Mini and my DIY build of L0rdGwyn's Aegis (an output transformer coupled tube amp).
GS-X Mini: As we all know, Utopia is very sensitive; even with low gain on this amp, it is not a completely black background, particularly as volume increases (no music playing). Everything sounds very tight, incisive, detailed. Very neutral and balanced presentation, soundstage is respectably wide (although the Utopia does not have the largest or widest SS in the first place). Perhaps a little too analytical in presentation, although I do typically enjoy the neutral and slightly analytical side, so no issues for me.
DSHA-3FN: Black background across the entire volume range. Notably more warmth than the GS-X Mini, overall smoother presentation, although less incisive than the Mini, perhaps less detail. Bass has more bloom and slightly more impact, although still tight and well-controlled. Mids are smooth, treble is seemingly slightly toned-down. Soundstage seems slightly more intimate than the Mini.
DIY Aegis (on Lo-Z): The Utopia's sensitivity is coming into play here again, as the background is not completely black, and noise becomes noticeable as volume increases (no music playing). The Aegis has the most mid-forward presentation of the group; bass is more present than the Mini, but less tight/controlled than the DSHA-3FN. The Aegis shines with having both the best soundstage presentation, as well as most notable instrument separation and pinpoint imaging. Treble seems smoother on the DSHA-3FN than the Aegis, which is surprising considering the SS vs. Tube dynamic at play here.
By category, my feeling is that the most adept performers were:
Handling Utopia's High Sensitivity: DSHA-3FN
Bass/Low-End: DSHA-3FN
Mids/Timbre: Aegis
Treble/"Air": I'm undecided on this one
Detail Retrieval: GS-X Mini
Soundstage & Imaging: Aegis
Overall, this was a close battle (as it usually is when A/Bing amps, from my experience), as all 3 amps are quite up-to-the-task when it comes to handling the Utopia 2022. The DSHA-3FN and Aegis were particularly close to taking the title for my preferences here; if I truly had to pick one, I'd have to say the DSHA-3FN might be the best pairing here with the Nutopia.