Just picked up a used ‘07 24SSV with stock speakers and sub but the previous owner had installed 2 HT4 amps. They are running what looks like 10awg power and ground wires to the amps and it calls for 4awg.

My question is wondering if I truly need to upgrade and how soon? The wiring mess leaves a lot to be desired but fixed 75% of it as I upgraded the factory headinit to a new Kenwood Bluetooth model today.