Lights dimming?

[legacygt420]

so i have a subaru legacy with pionner head unit, polk door speakers, a zapco 700 amp, one or two jl 15's depending on the mood, ond a kinetic 600. i have jl 4awg runnig back, 1/0 for the big 3, and 4awg from the kinetic 400 to the amp and grounding both. and a stock alternator. my lights have recently started dimming when the bass hits and i ca sense a lackl of voltage to the system but my meter says its got 13-14 volts, which it always had. i dont know what to do???? should i get a bigger alternator? run bigger wires? i plan on running 1/0 back and fourth from the main battery to the kinetic 600 in the trunk. PLEASE HELP

[Toady]

so i have a subaru legacy with pionner head unit, polk door speakers, a zapco 700 amp, one or two jl 15's depending on the mood, ond a kinetic 600. i have jl 4awg runnig back, 1/0 for the big 3, and 4awg from the kinetic 400 to the amp and grounding both. and a stock alternator. my lights have recently started dimming when the bass hits and i ca sense a lackl of voltage to the system but my meter says its got 13-14 volts, which it always had. i dont know what to do???? should i get a bigger alternator? run bigger wires? i plan on running 1/0 back and fourth from the main battery to the kinetic 600 in the trunk. PLEASE HELP

Lights can dim at 13 volts bro, Try getting a H.O Alt