@simao FWIW I have tried the same brand of speaker cables in three different but equal lengths with the same amplifiers and same speakers . (I own monoblock amps.) It's an interesting experiment.
I tried speaker cable lengths of 3.5M, 1.5M and .5M. In my system the length that sounded the best was 1.5M. When testing the 3.5M, I had a 2M IC XLR between the amps and the preamp. For the 1.5M and .5M, I had a 15ft IC XLR between the amps and preamp.
Although the .5M had plenty of jump, it made the high frequencies sizzle a touch and vocals sounded too forward. The 3.5M sounded "slow." The 1.5M made the sizzle disappear, located the vocals realistically in the sound stage and the music pace seemed faster than the 3.5M.YMMV
I tried speaker cable lengths of 3.5M, 1.5M and .5M. In my system the length that sounded the best was 1.5M. When testing the 3.5M, I had a 2M IC XLR between the amps and the preamp. For the 1.5M and .5M, I had a 15ft IC XLR between the amps and preamp.
Although the .5M had plenty of jump, it made the high frequencies sizzle a touch and vocals sounded too forward. The 3.5M sounded "slow." The 1.5M made the sizzle disappear, located the vocals realistically in the sound stage and the music pace seemed faster than the 3.5M.YMMV