I wanted to try this cable for bi wiring, had 2 pairs of cable where one would be enought for bi wiring, since the price was less than half i bought 2 pair 4 x 4 meters (16awg) for extra awg, bought only 2x4 meters of cordial 425.
It sounds really good or i would rather say it doesn't have a bright sound characteristic, which i love, if something sounds bright it's because of the recording, easy to strip.
Unfortunally i couldn't use 4 x 4 mm² at my amp end since there really isn't any low priced banana plugs that can handle 2 x 4 mm².
Amp Onkyo TX-8020 speakers wharfedale diamond 225 on isoacoustics stands.
I could see myself buying more cordial cable for my usb drive usb soundcard optical cable for my pc and for my external phonostange and cd player, cordial cable is good and so cheap that 6 cable in the right length is less than one qed performance optical or analog interconnect in 2-3 meter.