I wouldn't. 18 lines of gauge 22 is area equivalent to gauge between 9 and 10. Resistance will be in order of 1mohm/ft. 20mohm (both ways total) of 10ft cables is very low. Yes, it is creating divider with the impedance of the speaker, but it is the same divider no matter what delivered power is. Are you afraid of overheating the cable? Even if you run 12A causing 3W power dissipation in the cable it is only 0.3W per foot and it is peak power. Dissipated heat is a function of average power, that for music is very low - perhaps the highest for popular music at about 7% of the peak power - making here 20mW per foot.
Should I upgrade my speaker cables?
I got 4 Classe 25s that are bridged and pumping out 4000 watts to my Bower 802D3s , im bi amping and running 1000 to the highs and 1000 to the lows of each speaker, got 2 sets of Nordost Heimdell 2 speaker cables, which have 18 lines of 22 awg solid core copper. I feel that might be to thin to be running 1000 watts and considering selling the Heimdell 2s and upgrading to something with thicker gauges, am I fine with the Heimdells or should I upgrade now that I’m running 1000 watt’s per cable? What is recommended? My budget is $5k-$8k per set, I need 2 sets