Brooks SS 81 In

Short For "in the circuit," in other words "active."

Electric Current
A more formal term meaning the same as the term Current (the amount of electron charge passing a point in a conductor per unit of time).

Brooks BA 71 Bandwidth
1) The range of frequencies over which a tape recorder, amplifier or other audio device is useful. 2) The range of frequencies affected by an equalization setting.

Kilo
A prefix meaning 1000.

Brooks RM 80 Decibel (dB)
1) Relative measurement for the volume (loudness) of sound. Also used to measure the difference between two voltages, or two currents. See Zero dB.
2) A numerical expression of the relative loudness of a sound. The difference in decibels between two
sounds is ten times the common logarithm of the ratio of their power levels.

Fader
A control to control the gain of a channel on the console, thereby determining the level of the signal in that channel.

Hertz
The unit of frequency. Equivalent to cycles per second. Abbreviation: Hz.

Feed
To send an audio or control signal to.