684A
Common name: Altec 684A
The 684A is a dynamic omnidirectional microphone featuring the Altec “Golden” diaphragm and the sintered bronze protection filter. The impedance is variable by changing pin arrangement at the connector between 30/50 150/250 and 20000 Ohm. Includes individual frequency chart, stand adapter and storage case.
Electrical Characteristics
Frequency Response
35Hz - 20 kHz
Output Sensitivity
17.8 mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
30/50 150/250 20000Ω
Recommended Load
Powering
Supply Current
mA
Alternative Powering
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
XLR-3M
Connector notes
Available Colours
Non-glare dark green and black.
Weight
226.7 g
Length
190.5 mm
Min diameter width
28.5 mm
Max diameter
38.1 mm
Depth
Accessories
Included
Individual frequency chart, stand adapter and storage case.
Optional