Brooks RM 80 Ground Loop

A double grounding of a line or electronic device at two different "ground" points of differing voltage.

Audio
Most often referring to electrical signals resulting from the sound pressure wave being converted into electrical energy.

Brooks Cinema RM 909 CPU
Abbreviation of Central Processing Unit (The main "brain" chip of a computer or the main housing of a computer that contains the "brain" chip).

Crossover Frequency
1) The frequency that is the outer limit of one of the bands of a crossover.
2) In the Lexicon 480L delay/reverberation effects unit, the frequency at which the bass frequency reverb time is in effect rather than the mid frequency reverb time.

Brooks Cinema XB 33 Capacitance
The property of being able to oppose a change in voltage or store an electrical charge.

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

Condenser Microphone
A microphone which converts sound pressure changes into changes of capacitance. The capacitance changes are then converted into electrical voltage variations (an audio signal).

Foot Switch
A switch placed on the floor and pressed by a musician to do various functions.