This is interesting....
My comments on the ADX5000's sound quality vs the HD800S and Utopia were performed using a pair of ADX5000 I had on home demo. The pair of ADX5000 I purchased didn't arrive until around 1 week ago. My comments were based mainly on using the 5000 with the A-T stock balanced cable, as my headphone amps sound better in balanced mode, but I did try the stock single-ended cable briefly and the tonal balance was pretty similar.
I'm finding my new 5000 with the stock single-ended cable sounds more sibilant/etched in the treble than the 5000 I had on demo. I'm not sure if this is due to them needing more break-in time, or possible driver manufacturing variations, but it's a little concerning. I was therefore optimistic when I noticed your comment about the Periapt cable helping to tame some of the sibilance/etchiness.
I am very close to placing an order with Matt for a 10ft long cable sleeved in PVC instead of paracord. I just need to decide whether to buy the 'pro' version or the 'portable' version. The 'portable' version appeals to me because it is thinner / lighter / more flexible, however I don't know how its sonic signature compares to the 'pro' version that you bought. i.e. I don't know if the thinner option will have a similar effect on helping to reduce the sibilance/etching. I'd be grateful if you could please tell me how the thickness and weight of your Periapt cable compares to the A-T stock balanced cable?
EDIT - I've just noticed the photo you posted on July 3. It looks like the main section of the Periapt cable is slightly thinner than the A-T cable, but the individual cables that branch off to the earcups look slightly thicker than the A-T cable. Is this correct?
The AT cable is thicker (beyond the Y-split) and lighter, not sure if its the fabric material or a bit of both, while the Periapt cable is slightly more weighty.
Here's some pics:
This is what Periapt use on their cable.
More info here:
https://periaptcables.com/pages/quality
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