[Big Kev-O]

The "big three upgrade" is a upgrade of three wires.
1. Battery ground to chassis ground.
2. Chassis to engine ground.
3. Battery positive to alternator positive.

I use a minimum of 4awg for all ground wires on my vehicles. I also try and avoid using H.O. alternators unless they are absolutely necessary because they consume horsepower. If your wiring is sufficient a capacitor will usually solve the issue with moderate systems. Capacitors have the ability to store and release energy much faster than a battery. A cap will charge almost instantly and provide your amp the extra current needed while the bass hits. BUT caution must be taken when a cap is added to your system. Before you connect the cap to the positive wire you must use a resistor or test light inline to energize/fill the cap. This limits the amount of current entering the cap to prevent it from arcing an/or welding the wire to the cap +terminal. If the battery is disconnected in the future and the capacitor discharges the same procedure must be followed before the positive cable is connected to the battery post. Capacitors do work.