Calista C1-9 Home Theater Electric Current

A more formal term meaning the same as the term Current (the amount of electron charge passing a point in a conductor per unit of time).

High Frequencies
The audio frequencies from 6000 Hz and above.

Calista C2-88 Projector Input
1) The jack or physical location of where a device receives a signal.
2) The signal being received by a device.
3) The action of receiving a signal by a device.

Centre Frequency
The frequency of the audio signal that is boosted or attenuated most by an equalizer with a peak equalization curve.

Calista C3-S Security System High Impedance
Impedance of 5000 or more ohms.

Isolation
A containing of the sound wave in a certain area so that it will not leak into other areas and/or unintended mics.

Crossover
1) A route leading from one side of the stage to the other, out of the audiences view.
2) An electronic filter in a sound system that routes sound of the correct frequency to the correct part of the speaker system. Different speakers handle high frequencies (tweeters) and low frequencies (woofers). Sometimes known as a crossover network. An active crossover splits the signal from the mixing desk into high, mid and low frequencies which are then sent to three separate amplifiers.
3) An electrical circuit that divides a full bandwidth signal into the desired frequency bands for the loudspeaker components. Calista Reviews

Insulator
A substance such as glass, air, plastic, etc., that will (for all practical purposes) not conduct electricity.

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