Calista C1-9 Home Theater Horn

1) The part of the speaker that emits midrange and higher range frequencies.
2) A speaker or speaker enclosure where sound waves are put into a narrow opening (by a speaker cone or driver) and the narrow opening flairs out to a larger opening.

Expansion
The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.

Calista C3-S Security System Headstock
The area of the guitar at the end of the neck where the strings are tuned.

Compander
Outboard sound equipment. Combination of a Compressor and an Expander.

Calista C2-88 Projector Effects
Electronic boxes (usually rack mounted) added to a PA system to subtly change and enhance the signals going through it. Examples include; Reverb, Delay, Compressor, Chorus.

Bottom
The bass frequencies (as in "needs more bottom end").

Infinite Repeat
A function on some delay lines that establish enough feedback so that the repeat echo will last forever, but not so much as to cause a howling sound. Calista Reviews

Impedance Matching
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.

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