U 397
Primary use:
Type:
Polar patterns:
Common name: Neumann U 397
Production Status: Discontinued / Vintage
The U 397 is a large diaphragm condenser microphone especially manufactured for the ORTF (French Broadcasting Network) from 1971 to 1976 by Georg Neumann GmbH. It has the classic U 67 / U 87 body shape and is equipped with a K 870 capsule. The microphone works with – 9 V (+/-1 V.) special phantom powering followed by a DC/DC converter for capsule polarization. It can be switched between omnidirectional, cardioid and bidirectional polar pattern, has a -10 dB capacitive pre-attenuator and high pass filter. The U 397 uses the French SOGIE connector.
Electrical Characteristics
Frequency Response
40Hz - 16 kHz
Output Sensitivity
45 mV/Pa. (Later models) 21 mV/Pa
Max SPL
116
Max SPL, THD:
0.5
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
13 dB-A
Output Impedance
250Ω
Recommended Load
1kΩ
Powering
Supply Current
9 mA
Alternative Powering
Switchable Options
Pad
10 db
Filter/EQ
Low-cut filter
Physical Characteristics
Connector
Sogie (ORTF)
Connector notes
Available Colours
Satin nickel
Weight
550 g
Length
200 mm
Min diameter width
Max diameter
56 mm
Depth
Accessories
Included
Optional