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Power Wire Calculator
American Bass Audio
Calculate if your power wire is thick enough for your amplifier's current draw.
Beta⚠️ Beta Tool: This calculator is for informational purposes only. Always verify calculations and consult a professional installer. American Bass Audio is not responsible for any damage resulting from the use of this tool.
VOLTAGE DROP
—V
Enter your system specs below
System Specs
Total RMS of all amplifiers combined
12V off, 14.4V running — 13.8V typical
Class D: 75-85% · Class AB: 50-65%
Wire Settings
Power wire + ground wire combined
Smaller number = thicker wire
Results
CURRENT
—
V-DROP
—
EFF. VOLTAGE
—
CAPACITY
—
Recommendation
MINIMUM WIRE
—
Handles your current
RECOMMENDED
—
Room to upgrade
FUSE SIZE
—
Within 18" of battery
Big 3 Upgrade Recommended
Your system is running 1000W+, which puts heavy demand on your vehicle's electrical system.
1. Battery Ground
Battery (-) to chassis
2. Engine Ground
Engine to chassis
3. Alternator (+)
Alternator to battery
💡 Check out the American Bass Big 3 Kit — 100% OFC copper.
Quick Reference
0-150W
18 AWG
150-250W
14-16
250-500W
10-12
500-1000W
8 AWG
1000-1500W
4 AWG
1500W+
1/0 AWG
⚠️ Don't forget: Always install an inline fuse within 18 inches of the battery. The fuse rating should match the wire's ampacity, not your amplifier's fuse rating.
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