Microphone sets with constant current power (CCP)

The constant current power (CCP) microphone sets use high-quality coaxial cables. Some sets have a 3 m cable included and others have cables as accessories. It should be noted that longer cables will influence the upper frequency and dynamic ranges.

All GRAS microphone sets are delivered as a unit and are calibrated accordingly. The sets are delivered with calibration charts including sensitivity values and frequency response curves for the complete set. The sensitivity value can therefore be used directly in your system setup. Besides the CCP variant, GRAS microphone sets are available with 7-pin LEMO input.

For frequent verification of the measurement chain, a sound source will be required. GRAS supplies a series of pistonphones and sound calibrators for this purpose. Depending on the use (field or laboratory) and your internal quality control requirements, we recommend that the sets are recalibrated at least every second year. Contact your GRAS partner for factory and accredited calibration options.

GRAS 146AE 1/2'' CCP Free-field Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 133 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 10 – 90%
IP67

GRAS 146AE 1/2'' CCP Free-field Microphone Set

The GRAS 146AE is a 1/2" free-field measurement microphone set for measurements in extreme environments. It is terminated with a BNC connector and is optimzed for use under rough conditions at temperatures from -40 to 125°C. It provides accurate data under the most challenging conditions - it can re..

GRAS 147AX CCP Rugged Pressure Microphone

Freq range: 3.15 Hz to 20 kHz
Dyn range: 19 dB(A) to 133 dB
Sensitivity: 42 mV/Pa 
Temperature: -40 to +125°C
Humidity: 0 – 90%
IP67

GRAS 147AX CCP Rugged Pressure Microphone

The GRAS 147AX is a rugged CCP surface-mounted pressure microphone optimized for automotive engine compartment testing. It has an integrated cable with BNC connector and comes with a novel magnetic mounting system for easy and precise mounting even in difficult-to-access locations...

GRAS 147EB CCP X-Rugged Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 18 dB(A) to 133 dB
Sensitivity: 50 mV/Pa
Temperature: -40 to +125°C
Humidity: 0 – 90%
IEC 61672 class 2
IP67

GRAS 147EB CCP X-Rugged Microphone Set

The GRAS 147EB is a free-field microphone set optimized for automotive brake noise testing. With a  rugged design and extra protection of the diaphragm it is ideal for prolonged driving tests on public roads. It provides accurate data under the most challenging conditions - it can resist shock,..

GRAS 246AE 1/2" CCP Free-field Standard SysCheck2™ Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
IEC 61672 Class 1
Use: For general acoustic testing—
SysCheck2-enabled measurement chains

GRAS 246AE 1/2" CCP Free-field Standard SysCheck2™ Microphone Set

GRAS 246AE is a ½″ Constant Current Power (CCP) free-field microphone set with SysCheck2™ and is optimized for all acoustic applications, where the location of the main sound source is known and the microphone can be pointed directly at it ensuring 0° incidence. It is terminated with a BNC connector..

GRAS 46AD 1/2" CCP Pressure Standard Microphone Set, High Sensitivity

Freq range: 3.15 Hz to 10 kHz
Dyn range: 18 dB(A) to 138 dB
Sensitivity: 50 mV/Pa

GRAS 46AD 1/2" CCP Pressure Standard Microphone Set, High Sensitivity

The GRAS 46AD is a 1/2" Constant Current Power (CCP) pressure microphone set for measuring medium sound pressure levels at medium frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V (LEMO) type is GRAS 46AP...

GRAS 46AE 1/2'' CCP Free-field Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
IEC 61672 Class 1
Use: For general acoustic diagnostics

GRAS 46AE 1/2'' CCP Free-field Standard Microphone Set

The GRAS 46AE is a 1/2" Constant Current Power (CCP) free-field microphone set for measuring medium sound pressure levels at medium frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V (LEMO) type is GRAS 46AF...

GRAS 46AM 1/2'' CCP Free-field Standard Microphone Set, Wide Frequency

Freq range: 3.15 Hz to 31.5 kHz
Dyn range: 25 dB(A) to 149 dB
Sensitivity: 14.5 mV/Pa
Use: For general acoustic diagnostics

GRAS 46AM 1/2'' CCP Free-field Standard Microphone Set, Wide Frequency

The GRAS 46AM is a 1/2" Constant Current Power (CCP) free-field microphone set for measuring medium sound pressure levels at a wide range of frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V LEMO type is GRAS 46AC...

GRAS 46AO 1/2'' CCP Pressure Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 150 dB
Sensitivity: 12 mV/Pa

GRAS 46AO 1/2'' CCP Pressure Standard Microphone Set

The 46AO is a 1/2" CCP microphone set for wide-frequency pressure measurements. Its LEMO equivalent is 46AG...

GRAS 46AO-S2 1/2'' CCP Pressure Microphone Set, very short

Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 150 dB
Sensitivity: 12 mV/Pa

GRAS 46AO-S2 1/2'' CCP Pressure Microphone Set, very short

The 46AO-S2 is a 1/2" CCP microphone set for wide-frequency pressure measurements with very short preamplifier for confined spaces...

GRAS 46AQ 1/2'' CCP Random Incidence Standard Microphone Set

Freq range: 3.15 Hz to 12.5 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa

GRAS 46AQ 1/2'' CCP Random Incidence Standard Microphone Set

The 46AQ is a 1/2" CCP microphone set for random-incidence measurements...

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

Freq range (±3 dB): 0.5 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Use: For low frequency acoustic diagnostics

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

The GRAS 46AZ is a 1/2" Constant Current Power (CCP) free-field microphone set for measuring medium sound pressure levels at low frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V (LEMO) type is GRAS 46AN...

GRAS 46BC 1/4" CCP Multifield Microphone Set, High Sensitivity

Freq range: 4 Hz to 20 kHz
Dyn range: 24 dB(A) to 145 dB
Sensitivity: 20 mV/Pa

GRAS 46BC 1/4" CCP Multifield Microphone Set, High Sensitivity

The 46BC is a high-sensitivity, low-noise, multifield ¼″ CCP condenser microphone set with rear venting and is optimized for use with the protection grid...