Very curious. You run tube monoblocs and a tube pre-amp yet do not find the A. Copper too warm yet with my SS Hegel H390, the A. Copper cast a deep gloom over the music. The rest of my system , while tipped to the warm side of neutral, is not overtly warm and my room has it's share of of glass and hard surfaces.
I use a Schiit Lokius EQ between dac and amp and will try swapping out one run of the Silver R. IC's for the Matrix R.
Thanks for your input.