Well, since i design gear, that’s a moving target.
But the constants: Roon, wired ethernet (no wifi); one unfold; prototypes of the amps and preamps i have designed over the decades, including current projects; cables = nothing special since i fuse everything since i’m often working with hand made prototypes. Speakers are either; Vienna Acoustics Mahlers (main music room); Sounds Exclusive towers (old! I showed with them at CES and Stereophile in 1990s); occasional players Vandersteen 3 (old) or Totems.
Now, the big question:DACs. I have a Denefrips Aires (with some minor mods); a Theta DSPro Gen2 with my own USB/clock/de-jitter/ground decoupling ("galvanic isolation"), and power supply; older MSB with the same goodies (my power power supply, smae front end as the Theta) and a Allo Revolution/USBridge/Shanti (their fancy-pants power supply which s remarkably good).
Note that I disagree with most of the digital-analog debate. despite having three outstanding turntables i almost always prefer the 16/44 equivalent. Yes, analog has its advantages, bu overall i get better dynamics, clarity and lack of the distortion from wear, tear and crap pressings. A few specialty albums aside (the curve wreckers, but do we all want to listen to Joe Smooth Direct to disk all the time?).
With digital (non streaming), I prefer a mac/bitperfect over CD SPDIF output to the same dac in the same system levels matched (why? i have my guesses but none of us "know"). I prefer ROON with upsampling and unfolding over the Mac/Bitperfect (by tiny amounts without MQA, larger with MQA). I find the difference in re-mastered records bigger than ANY of these hardware differences. Want dramatic? Listen to the remaster of Quadrophenia, 11-17-70, Proclaimers, ....What does this say? They rally messed up the original mastering, or just didn’t care ( the stories of Pete and Rodger fighting over who got "buried" are legendary).
I give this for perspective on digital, which mostly sounds like crap, but almost never in my system. Aside from 1980s, bright, got-the-de-emphasis wrong recordings of course. They are just measurably bad.
G