Brooks BA 71 Direct box

Used in line to convert a high impedance signal into a low impedance signal.

Far Field
The area from 3 feet away from the sound source up to the critical distance.

Brooks XB 22 Horn
1) The part of the speaker that emits midrange and higher range frequencies.
2) A speaker or speaker enclosure where sound waves are put into a narrow opening (by a speaker cone or driver) and the narrow opening flairs out to a larger opening.

Clicking
Pressing and immediately releasing the switch on a computer's mouse.

Brooks KM 77 Beat
1) The steady even pulse in music.
2) The action of two sounds or audio signals mixing together and causing regular rises &.falls in volume.

FOH (Front of House)
Refers to the speakers that face toward the audience. Also called the "main" speakers.

Amplifier
A device which increases the amplitude (level) of an electrical signal (making it louder).

Bi-Amplification
1) A way of optimizing the efficiency of a speaker system by separately amplifying the High Frequency (HF) and Low Frequency (LF) portions of the sound signal and sending them down two pairs of cables to the speaker. Multipin Speakon connectors have been developed to do this.
2)The process of having of having low-frequency speakers and high-frequency speakers driven by separate amplifiers.