ESC
44-A

44-A

BrandRCA
ManufacturerRCA Victor
SeriesType 44 Microphone
DesignerHarry F. Olson
FunctionMicrophone
Produced1933-1937
Model IDMI-4025
Form Factor½" Standard Mount
Signal PathAnalog Hardware
Dimensions11.4 × 30.5 × 8.9 cm (W × H × D)
Weight9lbs
Frequency Response30Hz-16kHz, 70Hz-15kHz (Tighter Tolerance)
ElementRibbon (Transformer Coupled)
PatternFigure-8
Output Impedance25Ω, 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