Preamplifiers with traditional power supply (LEMO)

Traditional preamplifiers require an external power supply which delivers a supply voltage of either ±15 to ±60 V DC or +28 to +120 V DC. This type of preamplifier is normally connected to a suitable power supply (for example the GRAS Type 12AK) via a 7-pin LEMO plug or to an analyzer with a suitable LEMO connector.

GRAS supplies measurement microphone cartridges and preamplifiers separetely and was first mover in the acoustics industri to bundle the two items! Pick and choose from the wide range of GRAS measurement microhpone sets.

GRAS 26AA 1/4" Preamplifier with Integrated Cable for Intensity Probes

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.29 dB
Special feature: For GRAS intensity probe handles with 4-pin LEMO connectors

GRAS 26AA 1/4" Preamplifier with Integrated Cable for Intensity Probes

The 26AA GRAS ¼″ Preamplifier is a small robust unit optimized for acoustic measurements using condenser microphones. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AB 1/4''-1/2'' Universal Preamplifier with Integrated Connector

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.29 dB
Special feature: For both 1/2" and 1/4" microphone cartridges

GRAS 26AB 1/4''-1/2'' Universal Preamplifier with Integrated Connector

The GRAS 26AB 1/4" Preamplifier is a small robust unit optimised for acoustic measurementsusing condenser microphones. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AC-1 1/4" Standard Preamplifier with Integrated Miniconnector

Freq range: 2.5 Hz - 200 kHz Noise: 1.8 µV Gain: -0.29 dB Special feature: General purpose

GRAS 26AC-1 1/4" Standard Preamplifier with Integrated Miniconnector

The GRAS 26AC-1 1/4" Preamplifier is a small robust unit optimised for acoustic measurements using condenser microphones. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AH 1/2'' SysCheck Preamplifier with 3 m integrated cable

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.35 dB
Special feature: SysCheck

GRAS 26AH 1/2'' SysCheck Preamplifier with 3 m integrated cable

The GRAS 26AH ½-inch Preamplifier with SysCheck is a small and robust unit optimised for acoustic measurements using condenser microphones. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above200 kHz...

GRAS 26AI 1/2'' Preamplifier with Integrated Connector, Low Frequency

Freq range: 1 Hz to 200 kHz Noise: 1.8 µV Gain: -0.29 dB Special feature: Low frequency applications

GRAS 26AI 1/2'' Preamplifier with Integrated Connector, Low Frequency

The 26AI is a 1/2" microphone preamplifier with integrated 7-pin LEMO male connector and 40 GΩ input impedance...

GRAS 26AJ 1/2'' SysCheck Preamplifier with integrated connector

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.35 dB
Special feature: SysCheck

GRAS 26AJ 1/2'' SysCheck Preamplifier with integrated connector

The GRAS 26AJ ½-inch Preamplifier with SysCheck is a small robust unit optimised for acoustic measurements using condenser microphones. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AK 1/2'' Standard Preamplifier with Integrated Connector

Freq range: 2.5 Hz to 200 kHz
Noise: 1.8 µV Gain: -0.25 dB
Special feature: General purpose

GRAS 26AK 1/2'' Standard Preamplifier with Integrated Connector

The 26AK is a 1/2" microphone preamplifier with integrated 7-pin LEMO male connector. The CCP equivalent is GRAS 26CA...

GRAS 26AK-S1 1/2'' Preamplifier with Integrated Connector, Low Frequency

Freq range: 2.5 Hz to 200 kHz
Noise: 1.8 µV Gain: -0.25 dB
Special feature: Low frequency applications

GRAS 26AK-S1 1/2'' Preamplifier with Integrated Connector, Low Frequency

The 26AK-S1 is a 1/2" microphone preamplifier with integrated 7-pin LEMO male connector and 40 GΩ input impedance...

GRAS 26AL 1/4" SysCheck Preamplifier with 3 m integrated cable

Freq range: 2.5 Hz to 200 kHz
Noise: 1.8 µV Gain: -0.29 dB
Special feature: In-situ sensitivity calibration of 1/4" microphone/preamplifier set

GRAS 26AL 1/4" SysCheck Preamplifier with 3 m integrated cable

The GRAS ¼" Preamplifier Type 26AL is a small robust unit optimised for acoustic measurements using condenser microphones. Type 26AL hasa very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz. It is similar to Type 26AC, buth as a built-in SysC..

GRAS 26AM 1/2'' Standard Preamplifier with 3 m integrated cable

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.25 dB
Special feature: General purpose

GRAS 26AM 1/2'' Standard Preamplifier with 3 m integrated cable

The GRAS 26AM ½-inch Preamplifier is a small robust unit optimised for acoustic measurements using condenser microphones. It hase a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AR 1/4" Standard Preamplifier with Integrated Mini-connector

Freq range: 2.5 Hz - 200 kHz
Noise: 4 µV Gain: -0.35 dB
Special feature: For integration into structures

GRAS 26AR 1/4" Standard Preamplifier with Integrated Mini-connector

The GRAS 26AR 1/4" Preamplifier is a small robust unit short enough for use in confined spaces. It has a very low inherent-noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz...

GRAS 26AS 1/4" Standard Preamplifier with 3 m Integrated Cable, Very Short

Freq range: 2.5 Hz - 200 kHz
Noise: 4 µV Gain: -0.29 dB
Special feature: For confined spaces

GRAS 26AS 1/4" Standard Preamplifier with 3 m Integrated Cable, Very Short

The GRAS ¼" Preamplifier Type 26AS is a small robust unit short enough for use in confined spaces, e.g. for binaural measurements with the KEMAR Manikin (GRAS 45BB or GRAS 45BC) or GRAS 45CA Hearing-protector Test Fixture. It has a very low inherent-noise level, a wide dynamic range and a frequency ..