car audio-stereo-electronics-home stereo audio and electronics-mobile stereo audio and electronics-marine stereo audio and electronics-personal mobile stereo audio and electronics-woofers-amplifiers-speakers-capacitors-smart phones-tvs-computers-free audio stereo technical and installation advice

Then Again The Novel

HomespacersearchspacerproductsspacerAbout Usspacerhumorspacerfor writersspacercontact

Car StereospacerMarine StereospacerHome StereospacerPersonal ElectronicsspacerComputersspacerTech Advice

Car Audio Technical Help-Home-Stereo Technical Information- Glossary Of Technical Terminology-General Speaker Information-Choosing Speakers-About Woofers-About Midrange Speakers-About Tweeters-About Dual-Cone / Full Range / 2 and 3-way Component Speakers-About Capacitors-About Crossovers-About Equalizers-About Enclosures/Boxes-About Theile-Small Parameters-About Amplifiers-How To Install An Amplifier-Understanding Power Ratings-About Receivers/Head Units-Installing A Receiver-Installing LED/Neon Lighting-Choosing  The Right Tools-Technical FAQ Learn About Car Stereo Power Capacitors Learn About Choosing Car Stereo Speakers Learn About Car Stereo Amplifiers Learn About Car Stereo Theile Small Parameters Learn About Car Stereo Crossovers Learn About Car Stereo Tweeters Learn About Car Stereo Midrange Speakers Learn About Car Stereo Noise Reduction Learn About Car Stereo Speakers Learn About Car Stereo Power Ratings Learn About Car Stereo Head Units Receivers Learn About Installing Car Stereo Receivers Head Units Learn About Car Stereo Equalizers Learn About Car Stereo Two-Way Speakers - Three-Way Speakers - Four-Way Speakers Learn About Car Stereo Dual Cone & Cual Coil Speakers Learn About Car Neon Lights & Installation Learn About Car Stereo Enclosures Woofer Boxes Learn About Car Stereo Tools Learn About Car Stereo Woofers Learn How To Install A Car Stereo Amplifier Glossary of Car Stereo  Electtronics Terminology Learn About Car Stereo Frequently Asked Quesitons Home Stereo Technical Information and Advice About Power Suppplies Links To Stereo Electronics Manufacturers Websites

car audio-stereo-electronics-woofers-amplifiers-speakers-capacitors-speaker boxes-enclosures-alarms-midrange-tweeters- wiring-receivers-dynamat-equalizers-fans


Eliminating Noise


If your lights dim with the beat, or your speakers start smoking without permission, or your CD skips a beat or two, your amplifier may be trying to use more fast energy than the electrical system can supply. Unfortunately, your car's electrical system is not thinking about the needs of your amplifier. Power is being robbed from your audio system by such trifling matters as: the engine and lights. This may leave your amplifier hungry for power, and worse, delivering destructive distortion when it fails to get it.

Understand of course, that no capacitor is a substitute for an adequate amplifier to provide the amount of bass energy you want to project. Nor will it substitute for an inadequate car power supply. You may have to install a stronger alternator if you have one of the more powerful systems. The rest of your system must also be "up to spec" to serve that purpose.

Technically, a capacitor is an electronic device which consists of two rolled up plates of electrically conductive material separated by an insulator known as a dielectric. Within this frame an electrical field charge is developed. The quantum of this charge is the capacitor's value, measured in farads. It is largely determined by the surface area of the plates, the effective distance between the plates, and the chemical composition of the dielectric material.

Audio capacitors are energy reservoirs that store the necessary power your amplifier will need to punch those big bass notes while limiting clipping. They store power during intervals when it is not required, which is most of the time, and release it when a short term transient demand exceeds what is available from the car's power system. A stiffening capacitor for your amp is the simplest way to be sure your system always gets every bit of immediate current it needs.

From the smallest .5 farad, to 10 farads, there's a capacitor suitable for your installation. Mount them as close to the amplifier as possible, and use at least .5 farad (500,000 microfarads) per 500 watts RMS of power output. Using more will not cause problems. On the other hand, it will not contribute to the operation either, and it's easier on the wallet to just get what you need.

Many capacitors are rated for ESR. This is the Equivalent Series Resistance of a capacitor. A perfect capacitor would have only capacitance. All conductors have resistance. In a capacitor, there are many conductors such as terminal leads, foil and even the dielectric electrolyte. The resistance of all of these conductors contribute to the capacitor's series resistance. It's essentially the same as having a resistor in series with an ideal capacitor. Capacitors with relatively high ESR will have less ability to pass current from its plates to the load (the amplifier).

Discharging the Capacitor:
If you plan to remove your capacitor for any reason, you may want to completely discharge the capacitor to avoid a potential hazard. To discharge the capacitor (only after it's disconnected from the system, of course), will need to enable the current to flow from one terminal to the other. You can use either a test light or resistor for this purpose. Some large capacitors tend to develop a charge similar to a battery and will produce a small voltage across its terminals. Since, in a large capacitor (over .5 farad), even a small voltage could be dangerous. After it is discharged, you may want to connect the terminals together with a piece of wire or resistor. Even if the capacitor design doesn't permit it to develop adverse voltages when unused, leave the terminals connected as a visual confirmation of the unit's safety.

Charging with a Resistor:
Many capacitors will need to be intialized with a 10 to 50 ohm resistor connected to the power main for usually 8 to 25 seconds depending on the size. After charging is completed, simply connect the power main VERY Carefully.

All the capacitors we sell, come with instructions for connection; follow them exactly.

For information on installing capacitors, see our Installing A Capacitor Page.

Other Websites You Might Wish To Visit

The Electronics Superstore - Stereo Technical Information - The Speaker Store - Jokes Humor And Other Funny Stuff - Book Publishing - The Enterprises of R. LeBeaux - Electronics Warehouse - Barbara The Novel - Cute The Novel - Lessons The Novel - Then Again The Novel

copyright Home Page Privacy Statement Policies Testimonials Site Map