618A
Common name: Western Electric 618A
Production Status: Discontinued / Vintage
The 618A is the first commercially available (1931) dynamic microphone equipped with a duralumin capsule diaphragm and Cobalt magnets. It was developed by Bell Labs engineer Albert Thuras. It was widely used in broadcast applications during the 1930’s and 1940’s.
Electrical Characteristics
Frequency Response
35Hz - 9.5 kHz
Output Sensitivity
0.06 mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
38Ω
Recommended Load
Powering
Supply Current
mA
Alternative Powering
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
Proprietary
Connector notes
Available Colours
Weight
Length
Min diameter width
Max diameter
Depth
Accessories
Included
Optional