I need to know if i can use 550 watt power cables from my old amp to power my new 700 watt amp?

I have a 240 watt jbl subwoofer in my truck and a 200 watt kenwood amp i bought a kit of 550 watts.But i just bought a 900 watt visonik subwoofer and a 700 watt visonik amp. i need to know if i can use the 550 watt power,ground,rca cables for my new system?