Please 'Boom' Responsibly As most of you have noticed, the noise ordinances have become much tougher lately. Most of this is due to idiots, yes IDIOTS, who drive through residential areas with their windows down while their system is playing at full power. To make things worse, the music they listen to has all sorts of foul language that's not suitable for small children, (who may be playing outside). There are even a few people, who are even beyond idiot status, that play their systems at full power through residential areas after 10:00 PM (when many people go to bed). I don't believe that this type of behavior is good for the industry. If the fines get too stiff, people will stop buying large systems. If this happens, more people will get out of car audio (who wants a mediocre system). People get interested in things because they're exciting. A deck and four 6.5" speakers are not going to interest many of the younger car audio enthusiasts. If car audio enthusiasts keep annoying more and more people, the fines will keep getting tougher. All of this will only reduce interest in the equipment that fuels the industry. If you want to listen to your system at full volume, get out on the highway where there's little chance of bothering anyone. When you get to a red light, turn it down. If the only thing attractive about you is your 'system', you have some work to do. Bottom line... Think about what you're doing. Think about other people. It's not the end of the world if you have to turn the volume down for a little while.

Reactance:
Capacitors and inductors (coils), when connected to an AC voltage source, oppose the flow of electrical current. The amount of opposition depends on the value of the component (capacitor or inductor) and the applied frequency. Capacitors block direct current and tend to block lower frequencies. Inductors pass low frequencies with little or no opposition and tend to block higher frequencies. In theory a perfect inductor or capacitor has no resistance. The reactance of a capacitor or inductor is similar to the resistance of a resistor. The biggest difference is that a resistor opposes AC equally as frequency changes. The reactance of a coil (inductor) or capacitor changes with frequency.
Use this program to calculate the reactance for inductors and capacitors at various frequencies. You should notice that the reactance increases for inductors as the frequency increases. The reactance for the capacitor decreasesas the frequency increases.
Data Input:
Capacitor Value? microfarads
Inductor Value? millihenries
Test Frequency? hertz
Data Output:
Capacitive Reactance = ohms
Inductive Reactance = ohms

Capacitive Reactance = 
1
2*3.14*applied frequency*capacitor value

Inductive Reactance = 2*3.14*applied frequency*inductor value
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