Prepolarized cartridges (0 Volt)

Prepolarized cartridges (0 Volt)

Pre-polarized microphones are used typically with CCP (Constant Current Power) preamplifiers. These microphones must be connected to an input stage for CCP transducers or be powered by a CCP supply.
  1. 40AE 1/2" Free-Field Mic
    Freq range: 3.15 Hz to 20 kHz
    Dyn range: 15 dB(A) to 148 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40AE 1/2" Prepolarized Free-Field Microphone

    The G.R.A.S. 40AE is a 1/2" Prepolarized free-field microphone for measuring medium sound pressure levels at medium frequencies. The equivalent externally polarized 200 V type is G.R.A.S. 40AF.

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  2. 40BD-S3 1/4" Pressure Mic
    Freq range: 4 Hz to 70 kHz
    Dyn range: 44 dB(A) to 166 dB
    Sensitivity: 1.6 mV/Pa

    G.R.A.S. 40BD-S3 1/4" Prepolarized Pressure Microphone

    The 40BD-S3 is an IEC 61094 WS3P ¼" prepolarized pressure microphone with front venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its low sensitivity makes it ideal for sound measurements at high frequencies and high sound pressure levels of up to 174 dB. Its small size reduces the effects of diffraction and reflections around the microphone, resulting in a frequency range that extends up to 70 kHz.

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  3. 40DD 1/8" Pressure Mic
    Freq range: 6.5 Hz to 70 kHz
    Dyn range: 40 dB(A) to 175 dB
    Sensitivity: 0.7 mV/Pa

    G.R.A.S. 40DD 1/8" Prepolarized Pressure Microphone

    The 40DD is an IEC 61094 1/8" prepolarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its tiny size allows it to be used for measuring very high frequency sounds without disturbing the sound field. It can measure sound pressure levels up to 174 dB in the range of 6 Hz to 140 kHz. Learn More
  4. 40BD 1/4" Pressure Mic
    Freq range: 4 Hz to 70 kHz
    Dyn range: 44 dB(A) to 166 dB
    Sensitivity: 1.6 mV/Pa

    G.R.A.S. 40BD 1/4" Prepolarized Pressure Microphone

    The 40BD is an IEC 61094 WS3P ¼" prepolarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. Its low sensitivity makes it ideal for sound measurements at high frequencies and high sound pressure levels of up to 174 dB. Its small size reduces the effects of diffraction and reflections around the microphone, resulting in a frequency range that extends up to 70 kHz. Learn More
  5. 40BE 1/4" Free-Field Mic
    Freq range: 4 Hz to 80 kHz
    Dyn range: 30 dB(A) to 168 dB
    Sensitivity: 4 mV/Pa

    G.R.A.S. 40BE 1/4" Prepolarized Free-Field Microphone

    The 40BE is an IEC 61094 WS3F 1/4” prepolarized free-field microphone with rear-venting. The externally polarized equivalent is 40BF.

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  6. 40AQ 1/2" Random Incidence Mic
    Freq range: 3.15 Hz to 12.5Hz
    Dyn range: 16 dB(A) to 148 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40AQ 1/2" Prepolarized Random Incidence Microphone

    The 40AQ is an IEC 61094 WS2P/D ½" prepolarized random-incidence microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements, optimized to measure sound correctly in random, diffuse, and reverberant sound fields. It is extremely robust and reliable and can measure sound pressure levels up to 148 dB in the range of 3.15 Hz to 16 kHz. Learn More
  7. 40AO 1/2" Pressure Mic
    Freq range: 3.15 Hz to 20 kHz
    Dyn range: 20 dB(A) to 163 dB
    Sensitivity: 12.5 mV/Pa

    G.R.A.S. 40AO 1/2" Prepolarized Pressure Microphone

    The 40AO is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. Read about the externally polarized equivalent [40AG]

    It is a high-precision condenser microphone made according to IEC 61094-4 requirements and is ideal for coupler measurements in both laboratory and production environments. It is extremely robust and reliable and can measure sound pressure levels up to 160 dB in the range of 3.15 Hz to 20 kHz.

    40AO is individually factory-calibrated and delivered with a calibration chart stating its specific open-circuit sensitivity and pressure frequency response.

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  8. 40AD 1/2" Pressure Mic, High Sensitivity
    Freq range: 3.15 Hz to 10 kHz
    Dyn range: 16 dB(A) to 148 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40AD 1/2" Prepolarized Pressure Microphone, High Sensitivity

    The 40AD is an IEC 61094 WS2P ½" prepolarized pressure microphone with rear-venting. The externally polarized equivalent is G.R.A.S. 40AP

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  9. 40AZ 1/2" Free-field Mic, Low Frequency
    Freq range: 0.5 Hz to 20 kHz
    Dyn range: 14 dB(A) to 148 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40AZ 1/2" Prepolarized Free-field Microphone, Low Frequency

    The 40AZ is a prepolarized free-field microphone with a large dynamic range and a wide frequency response. Its externally polarized equivalent is G.R.A.S. 40AN.

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  10. 40AM 1/2" Free-Field Mic, Wide Frequency
    Freq range: 3.15 Hz to 31.5 kHz
    Dyn range: 20 dB(A) to 163 dB
    Sensitivity: 14.5 mV/Pa

    G.R.A.S. 40AM 1/2" Prepolarized Free-Field Microphone, Wide Frequency

    The 40AM is an IEC 61094 WS2F classified ½” prepolarized free-field, wide-frequency microphone with rear-venting. The externally polarized equivalent is G.R.A.S. 40AC.

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  11. 40BE-S3 1/4" Free-Field Mic, Front vented
    Freq range: 4 Hz to 80 kHz
    Dyn range: 30 dB(A) to 168 dB
    Sensitivity: 4 mV/Pa

    G.R.A.S. 40BE-S3 1/4" Prepolarized Free-Field Microphone, Front vented

    The 40BE-S3 is an IEC 61094 WS3F 1/4” prepolarized free-field microphone with front venting.

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