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User manuals, setup guides, troubleshooting help, and repair information for GRAS products.

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User Manuals, Instructions and Guides for GRAS products.

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GRAS 40LS High Precision Surface Microphone Instruction Manual

November 1, 2025

GRAS 40LS High Precision Surface Microphone Revision History Any feedback or questions about this document are welcome at documents@gras.dk. Revision Date Description 1 14 March 2011 First version 2 18…

GRAS AES TC-AA Automotive Audio Testing User Manual

August 27, 2025

GRAS AES TC-AA Automotive Audio Testing User Manual Specifications Brand: Axiometrix Solutions Application: Automotive Audio Testing using AES TC-AA guidelines Model: GRAS 2025-07-07 Introduction In this technote, we discuss the…

GRAS MED-440 EQset Miniature Production Line Microphone User Guide

February 11, 2025

GRAS MED-440 EQset Miniature Production Line Microphone Specifications Product Name: GRAS 40PM EQset Miniature Production Line Microphone Technology: EQset Designed for: Production line environments Features: Cost-effective, easy to use, resistant…

GRAS 42AG Multifunction Calibrator Instruction Manual

December 18, 2024

GRAS 42AG Multifunction Calibrator Introduction Main Features The 42AG Multifunction Calibrator is a portable, battery-operated precision instrument for calibration microphones and sound level meters. It produces an output level of…

GRAS 42AC-S2 Pistonphone Instruction Manual

March 25, 2024

GRAS 42AC-S2 Pistonphone Revision History Any feedback or questions about this document are welcome at gras@gras.dk. Revision Date Description 1 June 2012 Version June 2012 2 4 July 2013 Section…

GRAS 46BC Multifield Microphone Set High Sensitivity User Manual

December 31, 2023

GRAS 46BC Multifield Microphone Set High Sensitivity Product Information Specifications: Model: GRAS 46BC Microphone Type: 1/4 CCP Multifield Microphone Set Sensitivity: 20 mV/Pa Frequency Range: 4 Hz to 20 kHz…

GRAS 12AU 1-Channel Universal Power Module With Signal Conditioning And Power Amplifier Instruction Manual

September 20, 2023

Instruction Manual12AU 1-Channel Power Module with Signal Conditioning and Power Amplifier 12AU 1-Channel Universal Power Module With Signal Conditioning And Power Amplifier Revision History Any feedback or questions about this…

GRAS 246AE SysCheck2 Software Development Kit Instruction Manual

September 2, 2023

GRAS 246AE SysCheck2 Software Development Kit SysCheck2™ Software Development Kit Any feedback or questions concerning this document are welcome at gras@grasacoustics.com Revision Date Description 1 11 Mar 2022 SDK version…

GRAS 43AG Ear and Cheek Simulator Instruction Manual

September 2, 2023

An Axiometrix Solutions Brand Instruction Manual GRAS 43AG Ear and Cheek Simulator LI0189 – 1 June 2022 43AG Ear and Cheek Simulator Revision History Any feedback or questions about this…

GRAS 45CA Headphone Hearing Protector Test Fixture Instruction Manual

September 1, 2023

Instruction Manual GRAS 45CA Headphone/Hearing-protector Test Fixture LI0187 – 01 June 2022 Revision History Any feedback or questions about this document are welcome at gras@gras.dk. Revision Date Description 1 16…

GRAS 45CA Headphone/Hearing-protector Test Fixture Instruction Manual

Instruction Manual

Comprehensive instruction manual for the GRAS 45CA Headphone/Hearing-protector Test Fixture, detailing configurations, setup, calibration, technical specifications, and warranty information.

GRAS RA4800 Adapter for Sensitivity Verification Instruction Manual

Instruction Manual

Instruction manual for the GRAS RA4800 adapter, detailing its use for in situ verification of flush and surface microphones with sound calibrators like the GRAS 42AG. Includes procedure, correction values,…