Manufacturers' Specifications
GRAS 41AL

Sensitivity : 50mV/Pa, individually calibrated

Frequency Response : IEC 651 type 1
20 Hz to 80 Hz       ± 1 dB
80 Hz to 4 kHz       ± 0.7 dB
  4 kHz to 8 kHz     ± 1 dB
  8 kHz to 12 kHz   + 2 dB, - 3 dB
12 kHz to 20 kHz   + 3dB, -infinity

Dynamic Range, upper limit : > 156 dB SPL

Noise Floor :
A-weighted : 17 dB
Linear, 23 Hz to 22 kHz : 20 dB

Output Impedance : 55 Ω typically

Output Current : > 1 mA

Power Supply :
Preamplifier : 120 V
Polarization : 100 V

Power Consumption : 2.3 mA at 120 V

Temperature Range : - 40 to + 50 °C

Dimensions and Weight :
Diameter : 29 mm : 1.14 inches casing diameter
Length : 280 mm : 11 inches
Weight : 200 g : 0.44 lb

E&OE - specifications subject to change without notice.

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Gracey & Associates   01933 624212

BSI accreditation for instrument hire and calibration

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