Include

[CrEaTrE]

E


Efficiency The measure of loudspeaker's ability to convert power to work. Formula: Efficiency = (power out/power in) x 100. Efficiency is always expressed as a percentage.2

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EL Backlight Electro-Luminescent illumination for the lighted portion of a liquid crystal display. Considered to be a step-up featured display.1

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Electrolyte The name for the mixture of diluted sulfuric acid found in standard lead-acid vehicle storage batteries (Also see Acid).2

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Electrolytic Capacitor A capacitor with a negative and a positive terminal that only passes alternating current.2

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Electromagnetic Field A field of magnetic energy in the woofer's voice coil created by the audio signal passing through the wire.4

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Electromagnetic Wave A wave sent through space and matter by oscillating electric and magnetic fields.4

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Emergency Override A button or switch, possibly separate or hidden from the commonly used controls of a security system, that is used specifically to override or disarm a security system in the event that the primary means is unavailable or disabled.2

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EMR Detector A tool used to find the source of low frequency tape head interference (electromagnetic radiation).2

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Enclosure A box housing a speaker to separate the front sound waves from those in the rear.4

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Engine Disable A means, either electrical or mechanical, designed to prevent the vehicle's engine from either starting or running. The most common variety of engine disable uses a simple automotive relay to inhibit either the starter or the ignition.2

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Enhanced Protection Circuitry A feature designed to help prevent a device from voltage, current, and temperature faults.1

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Entry Delay The time interval a security system waits before sounding the alarm after a door of the vehicle has been opened.2

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EQ File A Custom File feature that allows a user to assign a equalization curve preset to a particular disc, such that when the disc is loaded, that EQ preset is selected automatically.1

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ESN A cellular phone's Electronic Serial Number.2

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ESP Electronic Shock Protection. An electronic circuit that stores the audio data stream from a CD or MD in a memory buffer. If the laser pick-up mistracks, audio still flows from the buffer preventing an interruption.1

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ESR Capacitors have an ESR expressed in ohms or milli-ohms. This loss comes from terminal lead resistance, termination losses, and dissipation in the dielectric material.4

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EX-Change A disc changer feature allowing the user to swap non-playing discs, while another disc continues to play.1

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Exit Delay The name given to the time interval a security system waits once given a command to arm. Exit delays are usually found on non-remote security systems that rely on keypads or the ignition switch to arm. This delay gives the operator time to exit the vehicle before the system arms.2