Catalog

Test base for GRAS artificial ears and couplers...

Octopus couplers for calibrating up to eight 1/2" microphones simultaneously...

The RA0073 is an adapter for using a 1˝ microphone with a ½˝ preamplifier. The influence of the RA0073 on the acoustic field is minimal...

The GRAS RA0075 is a 6cc coupler for testing earphones according to ANSI 3.7 - 1995 and IEC 60318-3...

The GRAS RA0076 is a thread adapter to use when mounting a 1" or a 1/2" microphone in the RA0075 NBS 9-A Coupler. In the case of a 1/2" microphone the RA0077 1/2" - 1" Adapter for Coupler is also needed...

The GRAS RA0077 adapts a 1/2” microphone (remove grid) into a 1" microphone (without grid). Designed for NBS 9A / IEC 60313 Coupler GRAS RA0075 and Artificial Ear with NBS Coupler GRAS 43AF...

The RA0080 is a 6pF input adapter for 1/4" preamplifiers. One end screws on to a 1/4" preamplifier and the other end has a Microdot input connector. This enables connecting a signal generator to the input of the preamplifier. Short circuiting the Microdot input results only in loading the ..

Pliers for firm but gentle gripping of a 1/2” microphone when unscrewing its protection grid or unscrewing the microphone from a preamplifier...

The GRAS RA0082 is an adapter for using a 1/8" microphone with a 1/4" preamplifier...

For utilising the signal and signal-ground pins only of the 7-pin LEMO input of a preamplifier power supply.  ..

Use as a substitute, if necessary, for GRAS RA0523 Snap coupling in the GRAS 43AD Artificial Ear to avoid ground loops. In this case, also replace the 1/2" microphone protection grid with the GRAS RA0091 Inslulated microphone protection grid. ..

The GRAS RA0086 is similar to the GRAS RA0067 but is used with a 1/4" externally polarised microphone (typically a GRAS 40BP) which can then be used as a high-impedance sound source, e.g. when calibrating an acoustic coupler such as the GRAS RA0045. The RA0086 has a microdot connector..