RCA

44-A (Rev. C)

Microphone

Main Details
Maker RCA Brand RCA Victor Company Harry F. Olson Designer Type 44 Microphone Series
Function
Additional Model ID MI-4025-C
Form Factor ½" Standard Mount
Signal Path Analog Hardware
Date Produced 1933-1937
Dimensions 12"x4.5"x3.5" (HxWxD)
Weight 9lbs
Frequency Response 30Hz-16kHz, 70Hz-15kHz (Tighter Tolerance)
Additional Specifications
Element Ribbon Transformer Coupled
Pattern Figure-8
Output Impedance 25Ω, 250Ω Selectable
Sensitivity (10 dynes/cm², 250Ω Load) 450mV
Sensitivity (10 dynes/cm², Zero Level: 12.5mW, 250Ω Load) -72dB Zero Level: 12.5mW
Sensitivity (10 dynes/cm², Zero Level: 6mW, 250Ω Load) -69dB
Sensitivity (1 dynes/cm², Zero Level: 12.5mW, Open Circuit) -86dB
Connections
Output Other Cable Mount

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