Brooks SS 81 Capsule

1) The variable capacitor section of a condenser microphone.
2) In other types of microphones, the part of the microphone that includes the diaphragm and the active element.

Crossover
1) A route leading from one side of the stage to the other, out of the audiences view.
2) An electronic filter in a sound system that routes sound of the correct frequency to the correct part of the speaker system. Different speakers handle high frequencies (tweeters) and low frequencies (woofers). Sometimes known as a crossover network. An active crossover splits the signal from the mixing desk into high, mid and low frequencies which are then sent to three separate amplifiers.
3) An electrical circuit that divides a full bandwidth signal into the desired frequency bands for the loudspeaker components.

Brooks GT 44 Hum
The 60 Hz power line current accidentally induced or fed into electronic equipment.

Direct box
Used in line to convert a high impedance signal into a low impedance signal.

Brooks TM-22 Final Mix
The two track stereo master tape which was mixed from the multitrack master.

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

Balls
1) The depth and thickness of a sound, usually on the bottom end of the EQ (as in "needs more balls"). 2) The strength of the voice on the mic (as in "check it like you have some balls").

Humbucker
Pickups that are coupled together to get a certain sound.