Supra Cat 8 Ethernet cable

No, I don't use a streamer, just a computer. My ear is sensitive to all kinds of digital wrongs so I would've heard it. I don't quite remember about breaking it in, it was alright from the beginning and I bought it new.

In my case, signal goes from computer to a not too bad Burson Dac via Wywires Silver USB cable. Wywires Silver power cord on the Dac. Grado RS1 headphones.

I am running the Supra Cat 8b cable with  my streamer left on playing a bunch of music with my amps off.  Will have it running a day or two. Hope this helps. Thanks for your suggestions.

I ran my Supra Cat 8 in for a fortnight. No noticeable brightness.

Replacing with TWL Freedom, and will use it to my TV for movies.

I choose Supra Cat8 for its build quality, at 50 bucks per meter, I thought it was a reasonable upgrade. At the time I was using a Node2i with a ARC dac, can’t say for certain if there was definitive improvement over the stock Cat5, at best there was a better sense of clarity? I did recently play with Monoprice Cat8 from Amazon Prime, which is a really well made cable (heavier gauge than Supra). I didn’t detect a difference between the Supra and Monoprice. admittedly, I suck at picking out micro nuances so ymmv.
Nevertheless at $30 for 25ft run it’s a no-brainer for anyone who wants to upgrade or compare against “audiophile” ethernet cables costing hundreds per foot.

I compared a regular Cat 5E ethernet cable, a Blue Jeans Cat 6A, and Certicables Cat 8 cables, all 3 meters.  The Cat 5E was the stock cheap cable provided by the cable company, the BJ 6A cost something like $10 and the C 8 was about $50 on either Amazon or eBay.  I thought there was a slight improvement with each step up in price, mostly what I would call "vividness" or immediacy.  The improvements weren't such that I am seeking out a $500 cable.  I stream Qobuz files through a Roon player onto my network and use a Bricasti M1SE DAC with a network player.  The analog signal is sent to a Benchmark HPA4 headphone amp and I use Kennerton Rognir Planar Magnetic headphones.