Sound and Vibration Instrument Hire and Calibration
GRAS 12AA Dual Channel Microphone Power Supply
|GRAS 12AA : Microphone Power Supply - dual channel||£ 5 a day *|
- Overload indicators
- High pass filters
- Gain selectable between -20 dB, 0 dB, +20 dB and +40 dB in both channels.
- The polarisation voltage = 0 V or 200 V.
- Frequency response = 4 Hz - 200 kHz or A-weighting.
- BNC outputs to analysers, DAT recorders etc.
- Mains unit available.
Ideal for use with GRAS 41AL Outdoor Microphone Systems when the sound level meter to be used does not have Lemo preamplifier inputs and / or polarisation voltage supplies.
The GRAS 12AA also provides supplies and signal conditioning for the GRAS 50AI Sound Intensity Probe - requires a AA 0011 cable.