Astatic 878HL دليل المستخدم

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878HL
HI-LO DYNAMIC
DESK PAGING MICROPHONE
Description
The Astatic Model 878HL is a duel impedance, omindirectional dynamic
desk microphone offering modern styling and features in a rugged Cycolac
housing for all industrial and commercial public address and paging
applications. The Model 878HL has a slide switch for low or high impedance
selection. The wide band frequency response is smooth and peak free, with
a slight rise above 2K Hz to give that "natural" highly intelligible sound.
The microp

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SPECIFICATIONS FOR 878HL Specifications Element: Dynamic Pattern: Omnidirectional Frequency Response: 50 to 12,000 Hz Output Level: HiZ: -55dB (0dB = 1 volt / microbar) -151 dB EIA LoZ: -58 dB (0dB = 1mw / 10 microbars) -76 dB (0dB = 1 volt / microbar) -152 dB EIA Impedance: HiZ: 40,000 ohms, matches 100K ohms or greater LoZ: 400 ohms, matches 125 to 1000 ohms Switch: Control: DPDT professional long life leaf switche