I realise being somewhat late to this here item.
However, yesterday I purchased a 3 meter Madrigal HPC XLR interconnect (for peanuts 🥜! ).
Having now looked at this helical planar construction (behind the connectors) shows how incredibly delicate this cable construction actually is!
I had initially planned to chop it up, and make 2 or 3 shorter cables from it.
But looking at the construction made me change my mind in a chiffy! 🙄😜
So now instead I tried the item between my ML326S pre and my PASS X350.5 amp, replacing my Transparent Music Link Ultra... one astonishing difference this presented!
It sounds brighter, clearer, more open, and has more PRAT than the 1.5 meter Transparent, which by comparison is build like a tank!
A far less delicate construction, but truly well made, for sure.
Now, if your system is on the bright side that HPC might just be to much of a good thing, if not - wow, it sounds about as delicate as I recall having heard e.g. listening to piano CD recordings of Beethoven and Chopin.
Addictive in one word.
Listening to badly mastered CDs... - it gets pretty terrible e.g. "The Best Of David Sanbborn" - so... by comparison the Transparent shows less of that badness, for sure.
However, for now I decided to keep the HPC in my system, it just sounds too good, so delicate, so right - and this for a 30 odd year old cable! KUDOS to Madrigal of old!