Sound and Vibration Instrument Hire and Calibration
GRAS 12AA Dual Channel Microphone Power Supply
|GRAS 12AA : Microphone Power Supply - dual channel||£ 5 a day *|
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.