Nor1209 1/2″ microphone preamplifier
The Nor1209 1/2″ microphone preamplifier has been designed for general use with most 1/2″ condenser microphone of type WS2 or LS2 according to IEC 61094-4: Measurement microphones – Part 4: Specifications for working standard microphones.
The key components that determines the accuracy of a sound level meter is the measurement microphone and its associated preamplifier. The effectiveness of these components in converting the acoustic signal into an electrical analogue set the maximum accuracy that can be achieved by the ensuing signal processing. Norsonic have a carefully balanced range of measurement microphones to suite a range of applications that complement modern instrumentation yet maintain traditional values.
We offer a broad range of 1/2″ and 1/4″ microphone preamplifiers.
- Broad frequency response
- Low noise
- High input impedance
- Low output impedance for driving long microphones cable without any loss in performance.
- High dynamic range
Applications
- Sound level meters
- General purpose
- Laboratory and field measurements
Features
- Low noise.
- High input impedance.
- Wide dynamic range.
- Wide frequency range.
- Low output impedance.
- System Check facility.
- Large supply voltage range.
- Detachable preamplifier cable.
Specifications
Frequency response (18 pF/small signal): 20 Hz ¬– 20 kHz: ±0,1 dB
Gain: Typ -0,1 dB (-0,2 with 20 pF)
Input impedance: 10 GΩ, 1,4 pF
Output impedance: 50 ohm typical
Noise (20 pF dummy mic.):
A-weighted < 2,2μV (typ 1,8μV)
Lin (20 Hz – 20kHz) <6 μV (typ 3,8 μV)
Power supply:
Single: 28 V (1mA) to 120 V (2,8mA)
Dual: ±14 V(1 mA) to ± 60 V (2,8 mA)
Maximum signal output voltage (peak): ±10 to ±50 V (dep. on supply)
Temperature: -25°C to +70°C (operation)
Relative humidity: 0 – 90%
Dimensions:
Length: 83 mm
Diameter: Body: 12,7 mm/Ring: 14 mm
Weight: 36 g
EC classification: As for sound level meter Nor140.