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Speakers Glossary
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Filter
Any electrical circuit or mechanical device that removes or attenuates energy at certain frequencies.

Fidelity
The quality of the recording or reproduction.

Flat Response
The faithful reproduction of an audio signal; specifically, the variations in output level of less than 1 dB above or below a median level over the audio spectrum.

Frequency
The number of waves (or cycles) arriving at or passing a point in one second, as expressed in hertz (Hz).

Frequency Response
The range over which sounds are produced by a speaker, varying from low frequency bass to high frequency, i.e. 20Hz up to 20kHz (20,000Hz).

Full-range
A speaker designed to reproduce all or most of the sound spectrum.