My 2 cents from recent upgrades.
Changed speaker cable from Analysis Plus Chocolate Oval to a double strand of their Black Mesh Oval 9 gauge. Big difference. I had long runs and some of the effect may be due to Bowie if more than cable choice, but a worthwhile upgrade.
I already had XLR balanced SR Foundation IC between amp and preamp, but as prior Streamer/DAC had only single post out, was using SR Foundation RCA IC between streamer and pre, and kept it that way when I got my current Gustard X26 Pro DAC. I finally got a SR Foundation SX balanced cable, and SQ definitely improved a bit - noticeably, not a lot, but enough that it was worthwhile IMO.
When I got the new DAC, I auditioned 6 different cables, and was surprised to hear that they all sounded different, and sadly the Shunyata Alpha sounded best with my gear (fortunately found one used on EBAY). Again when I had my Innnuos Phoenix USB reclocker between my streamer and DAC, I thought I would probably could get away with a cheaper cable fro
streamer
to reclocker, and auditioned half a dozen cables again. Again they sounded different, and from what I heard, it still made sense interms if SQ to get another Shunyata Alpha. All my other cabling and power cords are SR, so to the extent I had bias, I would have expected to have heard the SR USB cable sounding better, but still heard the Shunyata as better.
Stereo System 2024
Amp: Bryston 4B3 300 w x 2
Pre: Parasound Halo P6
Speakers: Tannoy Cheviots, Analysis Plus Black Mesh Oval 9 gauge biwired cables (21’ run)
Digital Streamer/Source: Heavily modified BlueSound NODE 130 (added Fidelity Audio clock board & LPSU)/ Innuos Phoenix USB/ Gustard X26 Pro DAC (connected by Shunyata Alpha USB cables.
All other interconnects: Synergistics Research Foundation or better
Power: Power conditioner: Synergistics Research Powercell 10 SE Mk 3 w SR Atmosphere level 3 cord; All power cords SR Foundation