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Sound and Vibration Instrument Hire and Calibration

GRAS 12AA Dual Channel Microphone Power Supply

GRAS Microphone Power Supply
GRAS 12AA : Microphone Power Supply - dual channel £ 5 a day *
Dual channel, battery operated power supply for GRAS, Norsonic and other compatible preamplifiers with Lemo 1B 7-pin connectors.
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.
GRAS 12AA Manufacturer's Specifications
Outdoor Microphone Systems
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.
Sound Intensity
The GRAS 12AA also provides supplies and signal conditioning for the GRAS 50AI Sound Intensity Probe - requires a AA 0011 cable.
* Our standard hire charges are based on a 4-day minimum period, details other options.