Brooks RM 909 Compression Driver

The unit that feeds a sound pressure wave into the throat of a horn (in a horn loudspeaker).

Field
1) In video, one half of a frame.
2) In computer-controlled devices a window display with functions and choices that the operator can make

Brooks Hi Fi reviews Fidelity
The recording or reproduction quality.

Inductor
A device designed primarily to introduce inductance into an electric circuit. Sometimes called a choke or coil.

Brooks HI FI projectors Input Monitor
A switch position and operational mode of the electronics of a tape machine where the signal at output of the electronics will be the same as the signal coming into the electronics. In this mode, the tape machine's meter will read the input signal.

Delay (Digital, Analogue)
1) Effect used to create echo…echo…echo…echo…echo…
2) In more advanced systems used in very large venues, delay can be used to time the arrival of the signal to the speakers in the back of the room so that people in the back hear the sound coming from those speakers at the same time that the sound coming from the speakers in the front of the room arrives.

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

Linear
The condition of obtaining a change at the output of the device which is proportional to the change occurring at the input.