Brooks RM 909 Distortion

Usually undesirable result of overloading sound equipment. Reducing the levels can remedy the situation.

Keying Input (Key Input)
An input on a dynamics processing device to control the device by an external audio signal.

Brooks HI FI projectors Ground Lift
A switch that breaks the connection between the ground point in one circuit and the ground point in another circuit.

Hz (Hertz)
1) An abbreviation for the term Hertz (the unit of frequency).
2) Unit of frequency equivalent to the number of cycles per second.

Brooks Hi Fi speakers Interface
Any device that allows one unit to work, drive or communicate with another unit when they cannot do so by just feeding each other often because the units are manufactured by different companies.

Efficiency
The acoustic power delivered for a given electrical input. Often expressed as decibels/watt/meter (dB/w/m). ESL �" Abbreviation for electrostatic loudspeaker.

Line Level
1) An amplified signal level put out by an amplifier and used as the normal level that runs through the interconnecting cables in a control room.
2) A low level signal such as the signal in a guitar cord. Most parts of a PA require a line level signal. Remember, however, that speaker outputs are not line level. Plugging speaker outs into line ins will result in damage to the equipment

Amplitude
The strength of a vibrating wave; in sound, the loudness of the sound.