Very bad advice, counterproductive & even dangerous.
I ordered a Cabasse Jersey MT360 with a 2*120 watt amp.
All professionals and especially if I had read the instructions before would have directed me to 1.5mm² or 2.5mm² which I have today (yes 20 days after this purchase). Yes I had to buy a new cable after this one, so...
The cable is just not designed for this power. Despite the advice of the "pros" at LDLC.
If you have speakers that need to receive more than 60 watts, go for good brands in 1.5mm² minimum. You will discover an incomparable sound (without really exaggerating).
I am particularly disappointed with the advice of LDLC and this good product used as a ground cable between a turntable and an amp.