Zepto (z) - A prefix meaning 10-21 or 0.000 000 000 000 000 000 001
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Zero Bit Detection - A circuit in a D/A converter that monitors the digital audio bit stream. upon encountering all bits low, or zero bits, the output of the D/A is disconnected from the preamp. This improves the signal-to-noise ratio specification.
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Zero Output - The absence of output signal or output power.
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Zetta (Z) - A prefix meaning 1021 or 1,000,000,000,000,000,000,000
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Zmax - This parameter represents the speaker’s impedance at resonance
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Zobel - A filter used to stabilize speaker impedance at a crossover frequency where impedance has risen to twice the nominal impedance.
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Zone - A specific area of a security system's coverage. A specific trigger input of an alarm.