Box Design 
Bandpass Subwoofer Box Design (FourthOrder) 
You can design your own bandpass subwoofer enclosure here for free. 
Box Dimensions Calculator, Solid Object Volume Calculator and Conversion Factors 
Figures out third dimension of a box, given two known dimensions and figures out volume of an object to be placed inside a box. 
Port Types for Speaker Boxes and Subwoofers 
A description of the various types of ports commonly used in speaker enclosures and the differences between them. 
SixthOrder BANDPASS SUBWOOFER ENCLOSURE DESIGN calculator 
You can design your own sixthorder bandpass subwoofer enclosure here for free. 
PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES 
Calculate your own port(s) length for subwoofer enclosures here  round and square vents. 
Sealed Subwoofer Speaker BOX DESIGN  Qtc Calculator 
Determine the Qtc of your speaker enclosure using this free calculator. 
Basic Box Building Information. 
Instructions to build subwoofer boxes. Materials, bracing, finishing techniques. 
BANDPASS SUBWOOFER Box Design Using Gain (FourthOrder) 
You can design your own FourthOrder bandpass speaker enclosure here for free. 
Sealed Subwoofer Box Design Calculator 
Design your own sealed speaker enclosure with my JavaScript enclosure design calculator. 
Sealed Rear Chamber Bandpass Sub Woofer Design Tips 
Here are some useful techniques for building a bandpass sub woofer enclosure. 
PORT DESIGN FORMULAs for SUB WOOFER ENCLOSUREs 
The formulas for calculating the minimum vent diameter, and the port(s) length for subwoofer enclosures can be found here  round and square vents. 
Ported Subwoofer Box Design Formulas & Calculator 
Design your own ported speaker box with my free JavaScript enclosure design calculator. 
Measurement Unit Conversions 
Convert units from metric to English with this JavaScript calculator. 
Selecting the Proper Subwoofer Enclosure Alignment 
How to pick the right box to make your subwoofers perform their best. 
Subwoofer Box Dimension Calculator 
Use this JavaScript calculator to determine the correct proportions for your speaker enclosure design. 
Vent Air Speed Formula and Calculator 
A page showing the formula to determine the air speed in a port, and a calculator so you don't have to do the math. 
Sealed SPEAKER and Subwoofer SYSTEM DESIGN Tips 
Tips about designing a sealed speaker box many are useful for any speaker design. 

Amplifiers 
An introduction To Amplifiers! 
Under standing the amplifiers basics. 
How To Install An Amplifier! 
The basics of installing amplifiers and power cable chart. 
Amplifier Terms! 
List of basic amplifier terms. 
Amplifier Power Specifications! 
This page is intended to explain amplifier power
specifications in more detail. 
Amplifiers 
There are many options when choosing an amplifier here are the basics. 
Understanding Amplifiers Power Specifications 
Understanding amplifier power ratings and explaining amplifier power specifications. 

Basic Electrical 
Understanding Ohm's Law 
Understanding ohms law and how it relates to car audio. 
Ohm's Law 
General over view of Ohm's Law. 
Ohm's Law (Voltage)  Javascript Calculator 
If you want to calculate an unknown voltage value, come try my FREE Javascript Ohm's Law Calculator. 
About Relays? 
Under standing and wiring Relays. 
About Diodes? 
Under standing and wiring Diodes. 
ohms? 
Understanding what ohms are and how they relate to car audio. 
Ohm's Law (Current)  Javascript Calculator 
If you want to calculate an unknown current value, come try my FREE Javascript Ohm's Law Calculator. 
Ohm's Law (Impedance/Resistance)  Javascript Calculator 
If you want to calculate an unknown resistance or impedance value, come try my FREE Javascript Ohm's Law Calculator. 
OHM's LAW Power, Current, Voltage, Resistance/Impedance 
If you are interested in electronics, come try out my FREE Javascript Ohm's Law Calculator. 
Ohm's Law (Power)  Javascript Calculator 
If you want to calculate an unknown power value, come try my FREE Javascript Ohm's Law Calculator. 

Car Audio Basics 
Planning Your System 
Now that you have some background on the world of car audio it is time to plan your system. I'll give you some pointers and an example system. 
Typical Systems 
Tips for designing different types of sound systems: Basic (for people on a budget), competition level and SPL systems. 
Speakers 
What speaker to buy, based on size, shape and specifications. Obtaining best sound possible from you speakers 
Subwoofers 
Free air, sealed, isobaric, bandpass, membrane enclosure configurations 
Crossovers 
Active vs. passive crossovers 
Equalizers 
Basic concepts such as frequencies, octaves, Q values, mono vs. stereo. Differences between parametric and graphic, active and passive equalizers 
Head Units 
Features to look for (controls, power, outputs, security). Kits and plugs, FM modulated CD changers pros and cons 
Basic System Design. 
Overall System planning tips. Brief description of each component and their interaction. 
Planning Your System 
Basic information on how to plan your system. 
Speaker Power Ratings and Amplifier Power Ratings 
Understanding the
relationships between speaker power ratings and amplifier power ratings. 

Crossovers & Filter Calculator 
CROSSOVERS  The Basics of TwoWay Passive Crossovers 
This page will teach you the basic information you need to understand before you design any passive crossover for a speaker system. 
Loudspeaker Driver Attenuation Circuit 
This page is designed to perform all of the necessary calculations involved with designing a shelving network for speaker systems. 
Speaker Crossover Network Design Formulas & Calculator (3rd Order Butterworth) 
Design your own ThirdOrder crossovers with my free online crossover calculator. 
Series Notch Filter  Speaker Impedance Correction at Fs (Resonant Frequency) 
This page will teach you how to utilize impedance correction to build a series notch filter network for a speaker. 
Crossover Network Design Formulas & Calculator (2nd Order LinkwitzRiley) 
Design your own secondorder crossovers with my free online crossover calculator. 
6th Order LinkwitzRiley Crossover Network Design Formulas & Calculator 
Design your own SixthOrder LinkwitzRiley crossovers with my new online crossover calculator. 
ZOBEL Filters for CROSSOVER Networks 
This page is devoted to the design and application of Zobel impedance shaping filters for loudspeakers. 
4th Order LinkwitzRiley Crossover Network Design Formulas & Calculator 
Design your own Fourthorder LinkwitzRiley crossovers with my free online crossover calculator. 
Parallel Notch Filter Circuit for Speaker Design 
Fix a peak in the response of your loudspeaker using my notch filter calculator 
Speaker Crossover Chart and Capacitance vs. Frequency Calculator(Highpass) 
Use this JavaScript calculator to determine what value of capacitors you need to use for a crossover design. 
Crossover Design Chart and Inductance vs. Frequency Calculator(Lowpass) 
Use this JavaScript calculator to determine the value of inductor to use in your crossover design. 
Butterworth 2nd Order Crossover Network Design Formulas & Calculator 
Design your own secondorder crossovers with my free online crossover calculator. 
Crossover Network Design Formulas & Calculator (1st Order Butterworth) 
Design your own firstorder Butterworth crossovers with my free online crossover calculator. 
Basic Crossover Calculators and Impedance stabilization circuit calculator. 
Calculate capacitor and inductor values for 1st, 2nd, 3rd, 4th order crossovers. Impedance stabilization circuit calculator. 
Custom Crossovers Basics 
Instructions and tips to design and build custom passive crossovers from scratch. 
4th Order Butterworth Crossover Network Design Formulas & Calculator 
Design your own fourthorder Butterworth crossovers with my free online crossover calculator. 

Equalizers 
Equalizers/Crossovers Basics 
Basic information about equalizers and crossovers. 
Equalizer Basics 
How to use an Equalizers to fine tune your system. 
Equalizer mounting and installation 
Equalizer mounting and installation. Tips to properly setup an equalizer. 

Installation and Wiring 
Installation Accessories 
There are many accessories that are necessary for a car audio installation, we take a look at same of the basics. 
Recommended tools 
Description, price and where to buy basic installation tools that you will need. 
Seat/Panel Removal 
How to remove trim rings, consoles, dashes, seats, door panels, rear decks, kick panels, etc. Also instructions to fix broken or cracked panels 
Wiring Multiple Speakers 
If you want to learn how to wire a multispeaker subwoofer system, this is the page. 
Road Noise/Rattles 
Adding damping materials such as sprays, Dynamat, foams, etc to get rid of road noise and rattles. 
Speaker Pods 
Step by step instructions to make your own Fiberglass kick panel pods. 
Fiberglass Basics 
Instructions, materials, safety, and general steps for fiberglass projects 
Custom Panels 
Step by step instructions to build your own custom panels. A list of most common materials used 
Tweaking 
Checking speaker polarity, adjusting amplifier gains, equalizers, crossovers, etc. for best and loudest sound without distortion 

Source Unit 
Head Units 
Choosing a head unit the for your vehicle. 
Head Units 
Main options and features available for head units and CD changers. Factory head unit upgrades. 

Speaker 
Speaker polarity 
How make sure all your speakers are in phase. 
Loudspeaker Efficiency Formula and Calculator 
A page showing the formula to determine the reference efficiency of any speaker, and a calculator so you don't have to do the math. 
Choosing Speakers 
These are the final link and arguably the most important component in the quality of sound you actually hear. 
Speaker/Sub Wiring 
Series and parallel wiring diagrams and formulas to obtain maximum power output from your system. 
Speakers Basics 
Basic information on speaker. 
Speakers installation 
Different types of speakers and applications. Power considerations. 

Trouble Shooting 
Alternator
Noise 
Instructions to eliminate the dreaded alternator whine that squeezes through audio systems 
