Well, a friend of mine sent me a short length of Duelund DCA12GA 600Vdc. It is the wire that is recommended for power cables, but some people like it a lot as speaker cable. I know my friend did! On horns. The difference is the dielectric, which is oiled cotton on the regular DCA cable, and a "Polycast" resin on the 600Vdc cable.
So, I connected the left channel with the Duelund, leaving the old cable on the right channel (there was not enough length to do both) and I must say that I’m impressed.
The Duelund DCA12GA used as speaker cable sounds a bit dark, very meaty, "intimate" but is articulate and quite detailed - I don’t feel there’s anything missing from my music. It seems the synergy with my horn speakers (which are not exactly "soft" sounding) and electronics (Gustard X26Pro DAC, Pass b1 preamp, Sublime Acoustics K231 active crossover, class D chip amps) is just right, toning it down a bit without sounding overly soft or mellow - electronica and rock sound great, upper bass is punchy and meaty, guitars have bite but everything is just darker in color)
On a laidback system, it would probably be better to use the regular Duelund cable, but on a bright / upfront system, the 600V cable works really well.
So, I’ve ordered some length of DCA12Ga 600Vdc to be able to cable the whole system, and I will come back to give my impressions with both channels. I expect the burn in period to be long and difficult but I’ll hang in there!