Neumann.Berlin U 67, Operating Manual, Page: 12 / 20

EN EN
12
10. Technical Specifications
Permissible atmospheric conditions:
1)
Operating temperature range ...........0 °C … +40 °C
Humidity range .........................0 %…75 % rel. hum
Storage temperature range ............–20 °C … +70 °C
Humidity range .........................0 %…95 % rel. hum
Acoustical op. principle ..............Pressure gradient
transducer
Polar pattern ......................Omni/cardioid/figure-8
Frequenzy response ........................20 Hz...20 kHz
Sensitivity 2) .................................15/24/16mV/Pa 3)
........................................
≅
–36,5 /–32,5 /–36 dBV
4)
Nominal impedance.................................200 ohms
Nominal load impedance ..................... 1000 ohms
Signal-to-noise ratio
4 ),
CCIR
5
) .................................................62/66/63 dB
3)
Signal-to-noise ratio 4 ),
A-weighted
5)
....................................... 73/77/74 dB
3)
Equivalent noise level,
CCIR 5) ..................................................32/28/31 dB 3)
Equivalent noise level,
A-weighted 5) ....................................21/17/20 dB-A 3)
Max. SPL 6)
for THD < 0.5 % ............................................. 114 dB
with preattenuation .................................... 124 dB
Dynamic range of the amplifer (cardioid)
A-weighted
6)
for THD < 0.5 % ......................... 97 dB
Max. output voltage ................................... – 10 dBu
Power supply ...............................................NU 67 V
Vacuum tube type ........................................... EF 86
Plate voltage ................................................... 210 V
Plate current ................................................. ≤ 1 mA
Heater voltage............................................... – 6,3 V
Heater current ........................................... ≤ 270 mA
Tube warm up time ......................approx. 1 minute
Required connectors:
Microphone ............................................. UC 5 cable
Power supply unit ....................................... XLR 3 F
Weight approx. ................................................560 g
Diameter ........................................................ 56 mm
Length .........................................................200 mm
Dimensions ..............................Ø 56 mm x 200 mm
94 dB SPL ≙ 1 Pa = 10 µbar
0 dB ≙ 20 µPa
1) All values are for non-condensing humidity. The values are valid for
clean and well-looked-after microphones or microphone capsules, respec-
tively. Any kind of pollution of capsules and membranes may restrict the
said values
2) at 1 kHz into 1 k ohms rated load impedance, tolerance ± 1 dB
3) Polar patterns: Omni/cardioid/figure-8
4) re 94 dB SPL
5) according to IEC 60268-1;
CCIR-weighting according to CCIR 468-3, quasi peak;
A-weighting to IEC 61672-1, RMS
6) THD of microphone amplifier at an input voltage equivalent to the cap-
sule output at the specified SPL.