Car Audio Equations
Here's a summary of all of the equations used throughout this site. If we miss any please let us know.
Ohm's Law
E=I*R
Where
E = voltage in volts
I = current in amps
R = resistance in ohms
Power equation
P = E*I
Parallel Resistances
1/Rt = 1/R1 + 1/R2 + 1/R3...
Where
Rt = total resistance
R1-R3 = individual resistances
Series Resistances
Rt = R1 + R2 + R3...
Where
Rt = total resistance
R1-R3 = individual resistances
Wavelength
wavelength = (speed of sound)/(frequency)
wavelength = feet
speed of sound = feet per second
frequency = Hertz
SPL Calculation
10 x log10(Power) + Efficiency = Maximum Output
Power = watts
Efficiency = decibels
Maximum Output = decibels
Conversions
Kilo = 1,000
Mega = 1,000,000
Milli = 1/1,000
Micro = 1/1,000,000
1 cubic foot = 1,728 cubic inches
Videos
Car Stereo Installation
Car Alarm Installation
Advanced Enclosures
Fiberglass Fabrication
Fiberglass Fabrication II
Back to School Special
Car Audio Background
What is Sound
Cabin Gain
Kick Panels
Ohm's Law
Electronic Components
Electrical System Upgrades
Car Audio Equipment Info
Car Audio Head Units
CD Changers and MP3
Car Audio Speakers
Choosing a Subwoofer
Car Audio Amplifiers
Signal Processors
Mobile Video
Satellite and Digital Radio
Wiring and Power
Power Capacitors
Security Systems
Exotic Components
Car Audio Planning and Buying
System Planning
What Fits Your Car
Budget Systems
Sample Systems
OEM Upgrades
Spotting Good Equipment
Equipment Reviews
Where to Buy New
Tips for Buying New
Get the Best Retail Deal
Free Installation
Common Scams
Avoiding Bait and Switch
Mail Fraud Laws
Where to Buy Used
Tips for Buying Used
More Than You Can Afford
Buying Wholesale
Selling Used Audio
Hidden Costs
Car Audio Installation
Choosing Installers
Installation Goodies
Installation Pictures
Installations You Can Do
Ten Car Audio Myths
Amplifier Installation
Capacitor Installation
Vehicle Wiring Diagrams
Noise Troubleshooting
Car Stereo Help
Become an Installer
Car Audio Care
Keeping Your Stereo Safe
Car Stereo Insurance
Making Your Stereo Last
Car Audio Warranties
Getting Free Repairs
Avoiding Noise Violations
Car Audio Safety
Car Audio Competitions
The Future of Car Audio
Equations
Contact
Terms of Use
Privacy Policy
