Pure Note Alluvion speaker cables

I will appreciate any opinions on the Pure Note Alluvion speaker cables. I've read more reviews on their I/C cables than speaker cables.

As far as I know, Purenote now sells them cheap, while I puchased my Alluvion cables for $1140 (at a 40% disciount at tghat time) a couple of years ago.

Perhaps, I did not have enough patience to let them break in and removed them after a week but occasionally used them in difefrent amps. My initial opinion was that they are very CLEAN and musical, if a bit sterile and light in the bass, and I used other cables...until recently when I was trying various cables with my NAF Legend-II amplifier (I was trying hard to tame the brightness of this amplifier, changing tubes, I/C cables and power cords, to little effect. When I connected Alluvion cables and let them warm up a bit, the sound became more natural and clean and that nasty "brightness" disappeared.

Is it a question of sinergy or some amplifiers are less sensitive to cable changes, while others are more sensitive?