Calista C2-88 Projector Equipment Rack

A cabinet with rails (or free standing rails) that have holes to accept screws at standard spaces and used to house outboard gear.

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).

Calista C3-S Security System Bi-Amplification
1) A way of optimizing the efficiency of a speaker system by separately amplifying the High Frequency (HF) and Low Frequency (LF) portions of the sound signal and sending them down two pairs of cables to the speaker. Multipin Speakon connectors have been developed to do this.
2)The process of having of having low-frequency speakers and high-frequency speakers driven by separate amplifiers.

Diffraction
The breaking up of a sound wave caused by some type of mechanical interference such as a cabinet edge, grill frame, or other similar object.

Calista C1-9 Home Theater Input Overload
Sending too high of a signal level into a device so that the first amplifier of the device overloads.

Amp
1) An abbreviation of the term Amplifier (A device which increases the level of an electrical signal.
2) An abbreviation of Ampere (the unit of current).
3) An abbreviation of amplitude (the height of a waveform above or below the zero line).

Integrated Circuit (IC)
A miniature circuit of many components in a small, sealed housing with prongs to connect it into equipment. Bose

Channel
1) In multitrack tape machines, this term means the same thing as the term Track (one audio recording made on a portion of the width of a multitrack tape).
2) A single path that an audio signal travels or can travel through a device from an input to an output.

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