Brooks Hi Fi speakers Hypercardioid Pattern

A microphone pick up sensitivity pattern where the least sensitive pick up point is more than 90 degrees but less than 150 degrees off axis (usually 120 degrees).

Chamber
1) An Echo Chamber (a room designed with very hard, non-parallel surfaces equipped with a speaker and microphone so that when dry signals from the console are fed to the speaker, the microphone will have a reverberation of these signals that can be mixed in with the dry signals at the console).
2) A program in a delay/reverb effects device that simulates the sound of an Echo Chamber.

Brooks RM 909 Hybrid
A product created by the marriage of two different technologies. Meant here as the combination of a dynamic woofer with an electrostatic transducer.

Ground
In electronics, a place (terminal) that has zero volts.

Brooks Hi Fi reviews Balanced
1) Having a pleasing amount of low frequencies compared to mid-range frequencies and high frequencies. 2) Having a pleasing mixture of the various instrument levels in an audio recording. 3) Having a fairly equal level in each of the stereo channels. 4) A method of interconnecting electronic gear using three-conductor cables.

In Port
A jack on a MIDI device or computer that will accept an incoming data signal.

Ground Lift
A switch that breaks the connection between the ground point in one circuit and the ground point in another circuit.

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