Power Modules

Why a Power Module?

An externally polarized condenser measurement microphone cannot work on its own. It needs to be connected to hardware that can act as an interface between the raw signal output and the data acquisition unit or measurement device. The Power Module is such an interface that improves the performance and reliability of the measurement chain.

It provides polarization voltage for the transducer, ensuring that the microphone gets the charging voltage it needs.
It provides supply voltage for the microphone preamplifier. The preamplifier acts as a unity gain impedance converter. It provides a certain amount of line drive capability by providing a low output impedance and output current, making it possible to transmit the signal from the transducer to the Power Module without significant degradation.
A power module can provide amplification or attenuation to the signal, thus making it possible to fine tune the measurement chain to the signals being measured and the hardware being used.
Selectable filters make it possible to exclude unwanted noise from the measurement, e.g., wind-induced noise from outdoor measurements.
Overload detection makes it possible to validate the measurements and is a useful tool in monitoring setups.
When a Power Module with gain is used, you can use longer cables because of the power module's ability to deliver current.
A Power module introduces electrical isolation
GRAS' range of power modules cover solutions for electroacoustic applications (LEMO), intensity probes (LEMO), lownoise microphones (LEMO) and power modules with traditional power supply (LEMO) as well as power modules with constant current power (CCP) that have the ability to take advantage of GRAS SysCheck2™-enabled microphones.

Filters

Sort by:

16 products

GRAS 12AA 2-Channel Power Module with gain, filters and SysCheck generator
GRAS
GRAS 12AA 2-Channel Power Module with gain, filters and SysCheck generator Sale price0,00 kr Price on quotation
GRAS 12AB 2-Channel Power Module for GRAS Intensity Probes
GRAS
GRAS 12AB 2-Channel Power Module for GRAS Intensity Probes Sale price0,00 kr Price on quotation
GRAS 12AB 2-Channel Power Module for GRAS Intensity Probes
GRAS
GRAS 12AC 6-Channel Power Module for GRAS Vector-intensity Probe Sale price0,00 kr Price on quotation
GRAS 12AD 1-Channel Power Module
GRAS
GRAS 12AD 1-Channel Power Module Sale price0,00 kr Price on quotation
GRAS 12AD 1-Channel Power Module
GRAS
GRAS 12AG 8-Channel Power Module with gain, filters and SysCheck generator Sale price0,00 kr Price on quotation
GRAS 12AD 1-Channel Power Module
GRAS
GRAS 12AK 1-Channel Power Module with gain, filters and SysCheck generator Sale price0,00 kr Price on quotation
GRAS 12AL 1-Channel CCP Power Module with A-weighting filter
GRAS
GRAS 12AL 1-Channel CCP Power Module with A-weighting filter Sale price0,00 kr Price on quotation
GRAS 12AN 4-Channel Power Module
GRAS
GRAS 12AN 4-Channel Power Module Sale price0,00 kr Price on quotation
GRAS 12AQ 2-Channel Universal Power Module with signal conditioning and PC interface
GRAS
GRAS 12AQ 2-Channel Universal Power Module with signal conditioning and PC interface Sale price0,00 kr Price on quotation
GRAS 12AR 2-Channel Power Module
GRAS
GRAS 12AR 2-Channel Power Module Sale price0,00 kr Price on quotation
GRAS 12AU 1-Channel Universal Power Module with signal conditioning and power amplifier
GRAS
GRAS 12AU 1-Channel Universal Power Module with signal conditioning and power amplifier Sale price0,00 kr Price on quotation
GRAS 12AX 4-Channel CCP Power Module with Gain
GRAS
GRAS 12AX 4-Channel CCP Power Module with Gain Sale price0,00 kr Price on quotation