Bro how bigger amps are you running.
You might be due for a cap to keep a charge to all the amps
I run 2x 500w amps and a 800w mono amp plus a cap to keep the charge to the amps.. It should help you stop any power being taken when starting up. Also stop lights from flickering when the bass kicks in
You could need a bigger earth or shorter earth.
Same with fuses
How are you splitting your power cables?
Pm if you need help