Car Amplifier Power Cable Calculator

Current draw figures are based on rms power of the amplifier with a 50 efficiency rating.

Car amplifier power cable calculator. If you connect a pair of 4 ohms speakers the maximum power is 1300 watts. In the specifications for an amplifier it might say something like this. Make sure the main power cable is thick enough that it can handle the total current draw of all the amplifiers. Equation used to calculate the data.

This calculator provides line loss with 2 conductor cable on a constant voltage line. Although wire gauge sizes smaller than 10 gauge may be acceptable for the amount of current draw we recommend using 10 gauge as the smallest wire size for any amplifier of 100. Using your current speaker and power wire current amp power is calculated allowing you to see any potential losses in watts with undersized cables. Step 5 connect the power wire.

Your two 12 subwoofers are wired together to present a total impedance of 4 ohms with a total power rating of 600 watts rms. D length of wire used ploss power loss in db prated power driven on line rl wire guage resistance vline voltage. This is telling you the rms power or more correctly the continuous power with a 8 ohm load and a different continuous power with a 4 ohm load. In your case if you connect a pair of 8 ohms speakers the maximum power from the amplifier is 700 watts.

An amplifier s expected output power determines what size wire to use. Topics range from basic system installation head units amplifiers speakers etc and mobile security car alarms and remote start to subwoofer box design and fiberglass fabrication. Hifi audiophile power cable 125v 15a hi end braided sleeve amplifier power cord audio ac power wire with us connector plug 3 3ft 1m 4 2 out of 5 stars 10 28 88 28. Hi joseph the maximum power output of an amplifier depends on the impedance ohms of the speakers connected to it.

When using only one battery refer to the primary. Our amp wire calculator helps optimize your amplifier s power output by recommending properly sized awg wires. The ratings of your subwoofers have no bearing at all on what size power and ground wire for your amplifier to use. This calculator for amplifier power voltage and current has little significance but is rather interesting.

Attach the power cable to the positive battery terminal not directly to the battery post itself. The car audio help dvd catalog includes five different videos covering many areas of car audio installation and custom fabrication. Ground cables should be the same size or larger as the power cable. Ploss 10 log 1 2 rl 2 rl vline squared prated rl rref 1000 d.

Check out our amplifier wiring diagram to see how the wiring gets connected in a typical 2 amp system.