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[CrEaTrE]

H


Harmonic A weaker overtone or undertone of the original note responsible for the character of the note.2

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Harness The universal name for a bundle or loom of wires that compose the wiring for a system.2

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Heat Dissipation The ability to transfer heat away from a component into the air to prevent damage to the speaker.4

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Heat Sink Part of the frame of the speaker used to conduct and radiate heat away from the motor assembly.4

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Hertz (Hz) The unit of frequency within a specific period, such as alternating or pulsating current; 1 Hz = 1 cycle per second.2

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High Frequency Refers to radio frequencies in the 3-30 MHz band. In audio it usually refers to frequencies in the 5-10 kHz band.2

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High Level Input An input configured to accept speaker level signals.1

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High Pass Filter (HPF) A network of components which attenuate all frequencies below a predetermined frequency selected by the designer. Frequencies above cut-off are passed without any effect.2

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High Power Output Speaker level outputs driven by an amplifier, typically at least 35 watts max per channel.1

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High Voltage ± 15VDC DC/DC Converter A component that converts the vehicle's 12 volts to a dual swing, 15 volt supply, typically used in step up, 4 volt preamp output models.1

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High Voltage Switching Power Supply A power supply that converts the vehicles 12 volts to higher voltage for improved dynamic range and higher preamp output levels.1

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HOP Highly Oriented Polyolefine. A proprietary Sony speaker cone material which combines high strength, low weight, and low resonance resulting in improved transient response, higher power handling, and flatter frequency response.1

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Horn (Audio) Refers to a loading device when part of a bass enclosure, or a directional device when used with a high frequency driver or compression driver.2

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Horn (Security) Refers to the built-in factory horn in the vehicle. Factory horns can be of the diaphragm type, voice coil type, or air-pump driven type (air horn). All types of horns are capable of being interfaced to a security system.1

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Housekeeping (Cellular) A part of a program which attends to chores, such as setting variables to zero, rather than being involved in computations.2