Brooks Cinema Series IC

Abbreviation of Integrated Circuit (A miniature circuit of many components that is in small, sealed housing with prongs to connect it into equipment).

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

Brooks Cinema xm 808 Decibel (dB)
1) Relative measurement for the volume (loudness) of sound. Also used to measure the difference between two voltages, or two currents. See Zero dB.
2) A numerical expression of the relative loudness of a sound. The difference in decibels between two
sounds is ten times the common logarithm of the ratio of their power levels.

Electricity
Electrical current (the amount of electron charge passing a point in a conductor per unit of time) or voltage (the force pushing electrons to obtain electrical current).

Brooks Cinema ZL 44 Active Crossover
Uses active devices (transistors, IC's, tubes) and some form of power supply to operate.

Figure Eight Pattern
Another name for Bi-directional Pattern (microphone pickup pattern picking up best from the front and back of the diaphragm and not picking up from the side of the diaphragm).

Critical Distance
The point a distance away from the sound source where the direct sound and the reverberant sound are equal in volume.

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