前置放大器和声校准器（校准系统专用）
典型应用与用途
- 精密测量
- 低压测量
- 通用型前置放大器
Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.25 dB
Special feature: Insert voltage for determining open-circuit sensitivity of a microphone
GRAS 26AG 1/2'' Insert Voltage Preamplifier with Integrated Connector
The GRAS 26AG is a small robust preamplifier with insert voltage calibration facility. 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: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.29 dB
Special feature: For open-circuit sensitivity calibration of 1/2" and 1/4" microphone cartridges
GRAS 26AN 1/4'' Insert Voltage Preamplifier
The GRAS 26AN 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 26AN is configured to permit use of the insert voltage-technique for determining the open-circuit sensitivity of a microphone.
