At the mouth reference point (MRP), which is 25mm from the detachable lip ring (35mm from the mouth of the G.R.A.S. 44AA), the maximum continuous signal it can produce in 1/3-octave bands is 100dB re. 20µPa in the frequency range 100Hz to 16kHz. Its loudspeaker accepts an external signal either directly or via its own built-in power amplifier (when power is applied).
Jigs are included for calibration according to CCITT P.51 and IEEE 269. These are for use with 1/4" or 1/2" microphones. One jig holds the microphone at 0º incidence (1/4" only) to the sound source, the other at 90º incidence (1/4" or 1/2").
|IEEE standard||269, 661|
|Maximum power, continuous||W||10|
|Maximum power, pulsed 2 sec.||W||50|
|Temperature range, operation||°C / °F||10 to 35 / 50 to 95|
|Input signal, max.||Vrms||2|
|CE/RoHS compliant/WEEE registered||Yes/Yes/Yes|
|Weight||g / oz||1050 / 37.038|
Built-in power amplifier
Maximum continuous output level at MRP [200 Hz - 6 kHz] 110 dB re. 20 μPa
Maximum continuous output level at MRP [100 Hz - 16 kHz] 100 dB re. 20 μPa
Distortion 250 Hz - 8 kHz (Linear signal @ 94 dB at MRP) typically 1 %, max. 1.5 %