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 for microphone cartridges separately and was the first in the acoustics industry to bundle the two items! Pick and choose from the wide range of GRAS measurement microphone sets.
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.
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.
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.
Freq range: 2.5 Hz to 200 kHz
Noise: 6 µV Gain: -0.29 dB
Special feature: Very short
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 response from below 2 Hz to above 200 kHz.
Freq range: 1 Hz to 200 kHz
Noise: 1.8 µV Gain: -0.29 dB
Special feature: For low frequency and low-noise applications
GRAS 26HG 1/4" Preamplifier with 3 m Integrated Cable, Low Frequency
The GRAS ¼″ Preamplifier Type 26HG 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 wide frequency response from below 1 Hz toabove 200 kHz.
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.
Freq range: 0.5 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.
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.
