Brooks XT 20 Active Crossover

Uses active devices (transistors, IC's, tubes) and some form of power supply to operate.

Beats Per Minute BPM
The number of steady even pulses in music occurring in one minute and there fore defining the tempo of the song.

Brooks Cinema XR 607 Binary
A numbering system based on two. In binary there are two symbols used ("l" and "0").

Hall
A large building designed for concerts; also called a concert hall.

Brooks GT 845 Dry
Describes a sound coming from the PA with no effects on it.

ADAT
A trademark of Alesis Corporation designating its modular digital multitrack recording system released in early 1993.

Bi-Directional Pattern
A microphone pick up pattern which has maximum pick up directly in front and directly in back of the diaphragm and least pick up at the sides.

Inverse Square Law
Simply stated, the fact that in an un-obstructed area (like an open field) the sound pressure level will drop to half-pressure (-6 dB) every time the distance to the sound source is doubled.