Need More Info First
Answer a Few Questions First
1) What is the Total Possible Amperage Draw on all Your Amplifiers Combined (Add up the Fuses on all your amps and that is the number I am asking For)?
2) What is the Amperage output of your current Alternator ?
3)Or is your Alternator the factory alternator
4) What size battery is up front
5) What Gauge size and brand of power wire are you using?