Big 3 Upgrade
How Big of an Alternator Do I Need for a Car Audio System?
Learn how to size a high-output alternator for a car audio system, calculate amplifier current draw, and plan the charging upgrades your system needs.
What Is the Big 3 Upgrade? (And How to Do It) — Car Audio Guide 2026
What is the Big 3 upgrade in car audio? Learn what it is, what gauge wire to use, whether it's worth it, and how to do the Big 3 upgrade step by step — plus the wire you need in stock.