Brooks Cinema Projectors Amplifier (Power amp, Head)

It's the part of the sound system that actually magnifies or "amplifies" the sound. In other words, it makes stuff louder.

Amp
1) An abbreviation of the term Amplifier (A device which increases the level of an electrical signal.
2) An abbreviation of Ampere (the unit of current).
3) An abbreviation of amplitude (the height of a waveform above or below the zero line).

Brooks Cinema XS - 45 ID
An index signal (digital data that gives the machine information of where selections start, their selection number, etc.) on a DAT or CD.

Cable, XLR
A balanced cable used for low impedance microphones and sometimes for connections between some parts of the PA. Commonly referred to as a "mic cord".

Brooks QS-70 Input/Output Module
A set of controls, on one housing, for an in-line console that has two channels (one for recording and one for monitoring) and has controls for all console sections.

Boundary Mic
A microphone mounted on a flat plate that acts as a reflective surface directing sound into the mic capsule. Used for general pick-up over a large area. See PCC, PZM.

Feed
To send an audio or control signal to.

High-Pass Filter
A device that rejects signals that are below a certain frequency (called the cut-off frequency) and passes signals with frequencies that are higher.