Gracey Hire Logo
Gracey & Associates Hire and Calibration

GRAS Microphones, Preamplifiers, Calibrators and Power Supplies



Gunnar Rasmussen is a very famous name in the world of acoustics. For many years he worked at Bruel & Kjaer designing and developing their world famous range of microphones.

In 1993 he set up his own company - GRAS - Gunnar Rasmussen Acoustic Systems to specialize in microphones and associated electronics. Click a link for more details.

GRAS firm specialises in precision measurements, having a extensive range of free-field, pressure and random incidence 1/2" and 1/4" condenser microphones. Plus specialist microphone systems like sound intensity probes and outdoor microphones with specifically designed responses to compensate for the vertical orientation due to the rain deflector, insert voltage calibration and the source of noise being at 90°. Click a blue link for more details.

GRAS Microphones, Preamplifiers, Instruments Daily Hire *
GRAS 12AA Power Supply Module - battery operated - 2 channel £     5
GRAS 26AA Preamplifier - 1/4" with 0.3 m of thin lead to 4-pin Lemo connector £     3
GRAS 26AB Preamplifier - 1/4" with 1/2" casing and integral 7-pin Lemo connector £     3
GRAS 26ACPreamplifier - 1/4" with 2m of thin cable to 7-pin Lemo connector£     3
GRAS 26AFPreamplifier - 1/2" with integral 7-pin Lemo connector£     3
GRAS 26AGPreamplifier - 1/2" with insert voltage and integral 7-pin Lemo connector£     3
GRAS 26AKPreamplifier - 1/2" with integral 7-pin Lemo connector - general purpose£     3
GRAS 40AEMicrophone - 1/2", free-field, pre-polarised, general purpose£     4
GRAS 40AFMicrophone - 1/2", free-field, 200 V polarisation, general purpose£     4
GRAS 40AKMicrophone - 1/2", sound intensity set, matched pair with spacers£   12
GRAS 40ANMicrophone - 1/2", free-field, 200 V polarisation, low frequency£     5
GRAS 40ASMicrophone - 1/2", community noise - 90º incidence correction£     4
GRAS 40BFMicrophone - 1/4", free-field, 200 V polarisation, wide band£     6
GRAS 41AL Outdoor Microphone System - type 1£     8
GRAS 42AA Pistonphone Calibrator - 114 dB @ 250 Hz£     6
GRAS 50AI Sound Intensity Probe£   20
GRAS 51AB Sound Intensity Calibration Unit£     8


GRAS Accessories Daily Hire *
AA 0008Cable - Preamplifier extension, 7-pin Lemo, 3 m£     2
AA 0010Cable - GRAS 50AI probe extension, 12-pin Lemo, 10 m£     4
AA 0011Cable - GRAS 50AI probe adaptor to 2 x 7-pin Lemo, 1 m£     3
AB 0002Power supply - see GA 40B1-00 
AG 0001Adaptor - 7-pin Lemo 1B socket to 7-pin B&K plug£     1
AL 0001Desiccator delivered with 41AL systems£     2
AL 0002Tripod adaptor - 1/2" preamplifier 'tube'£     1
AL 0003Tripod adaptor - 1/2" and 1/4" - swivel head£     2
AM 0037Transport cap delivered with 41AL systems 
AM 0145Windshield, was AM 0052 - see GA 83G1-00 
GR 0010Adaptor - converts 1/4" preamplifiers for 1/2" microphones£     1
RA 0001Adaptor - 1/2" microphones with 1/4" preamplifiers - 90 degrees£     1
RA 0003Adaptor - 1/2" microphones with 1/4" preamplifiers - straight£     1
RA 0010Calibration coupler - 41AL systems£     1
RA 0011Goose-neck with 7-pin Lemo connectors£     2
RA 0020Nose cone for 1/2" microphones£     2


* Our standard hire charges are based on a 4-day minimum period, details other options.

Gracey & Associates  01933 624212  hire@gracey.com
British Standards accreditation for noise and vibration instrument hire and calibration.
Home l Manufacturers l Applications l Hire Notes + FAQ l Site Search l Standards l Calibration l Downloads l Glossary l Feedback + Links l IOA l NEWS

GRAS keywords; G.R.A.S Microphone Hire, GRAS Sound Intensity