Quality Measurements, Versatile Design



Highlights:

  • Quickly and easily change between ½" and ¼" IEC 61094-4 compliant microphone cartridges
  • 15.5 dBA noise floor, 100 kHz capability based on microphone cartridge selected
  • Fast rise times and transients for superior impulse responses

Applications:

  • Loudspeaker Design (Rub and Buzz)
  • Building Acoustics
  • Real-time Analysis (Live Sound)
  • Accurate Modeling
  • High Definition Recording

PCB's patented phantom powered preamplifier (426A14) boasts a versatile modular design compatible with any ½" or ¼" IEC 61094-4 compliant microphone cartridge. This adaptability empowers users to choose the cartridge best suited for specific tests while utilizing a single universal 48V preamplifier.

The 426A14 package comprises four components: a preamplifier (compatible with 48V, 24V, or 12V phantom power), a ½" microphone adapter, a ¼" microphone adapter, and a microphone holder. Simply add the preferred microphone cartridge, connect it to your XLR connector, and you're ready to begin testing. For applications demanding a low noise floor, opt for the 377B02 ½" high sensitivity cartridge with a 15.5 dBA noise floor rating. Alternatively, for high frequency and amplitude capabilities, utilize a ¼" microphone to reach frequencies up to 100 kHz or sound pressure levels of 164 182 dB. Switch between free-field, random incidence, and pressure field responses in seconds with the various microphone cartridges.

All of PCB's prepolarized microphone cartridges seamlessly integrate with the 426A14 preamplifier. Each cartridge adheres to stringent Test and Measurement standards, delivering a flat response across a broad frequency range. This performance ensures the most accurate representation of natural sound, facilitating precise modeling of other microphones or speakers.

Unlike phantom powered microphones with plastic diaphragms, PCB employs a stable stainless alloy diaphragm that remains unaffected by temperature, humidity, or atmospheric pressure changes, yielding more precise test results. Each system undergoes rigorous qualification and comes with a traceable calibration certification. The metal alloy diaphragm simplifies calibration across the entire frequency range of the cartridge using electrostatic actuators, common precision calibration devices in the test and measurement industry.

In stereo recording, microphone pairs closely matched in frequency, sensitivity, phase, and spacing capture subtle high-frequency ambient room characteristics, even when placed farther from the sound source. This results in a more immersive, realistic stereo sound with enhanced blending and fidelity.

Explore AudioXpress Magazine's evaluation of PCB microphones for further insights, here.

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Model Number376A31376A32376A33379A33
 Add to CartAdd to CartAdd to CartAdd to Cart
Price:$1,400.00 USD$1,400.00 USD$1,400.00 USDAdd to Cart for Quote
Performance
Nominal Microphone Diameter1/4"1/2"1/2"1/2"
Frequency Response Characteristic (at 0° incidence)Free-FieldFree-FieldFree-FieldFree-Field
Sensitivity (±3dB)-54 dB re 1 V/Pa------
Sensitivity (±1.5dB)---26 dB re 1 V/Pa---38 dB re 1 V/Pa
Sensitivity (±2dB)-----38 dB re 1 V/Pa--
Sensitivity2.0 mV/Pa50 mV/Pa12.6 mV/Pa12.6 mV/Pa
Frequency Range (+2 / -3dB)4 to 100000 Hz------
Frequency Range (±3dB)----3.15 to 40000 Hz3.15 to 40000 Hz
Frequency Range (±2dB)5 to 80000 Hz3.75 to 20000 Hz3.15 to 31500 Hz3.15 to 31500 Hz
Frequency Range (±1dB)7 to 12500 Hz7 to 10000 Hz5 to 16000 Hz5 to 20000 Hz
Lower Limiting Frequency0.75 to 4.0 Hz1.0 to 3.0 Hz1.0 to 2.4 Hz1.0 to 2.4 Hz
Inherent Noise40 dB(A) re 20 µPa15.5 dB(A) re 20 µPa22 dB(A) re 20 µPa22 dB(A) re 20 µPa
Dynamic Range (3% Distortion Limit)165 dB re 20 µPa137 dB re 20 µPa150 dB re 20 µPa150 dB re 20 µPa
Environmental
Temperature Range (Operating)
-40 to +149 °F
-40 to +65 °C
-40 to +149 °F
-40 to +65 °C
-40 to +149 °F
-40 to +65 °C
-40 to +149 °F
-40 to +65 °C
Temperature Coefficient of Sensitivity (+14 to +149°F (-10 to 65°C))
0.003 dB/°F
0.006 dB/°C
0.005 dB/°F
0.009 dB/°C
0.003 dB/°F
0.006 dB/°C
0.003 dB/°F
0.006 dB/°C
Static Pressure Coefficient-0.009 dB/kPa-0.013 dB/kPa-0.007 dB/kPa-0.007 dB/kPa
Humidity Coefficient of Sensitivity (0 to 100%, non-condensing)±0.001 dB/%RH±0.001 dB/%RH0.002 dB/%RH0.002 dB/%RH
Influence of Axial Vibration (0.1g (1 m/s²))60 dB re 20 µPa63 dB re 20 µPa66 dB re 20 µPa66 dB re 20 µPa
Electrical
Polarization Voltage0 V0 V0 V0 V
Current Draw6.5 6.5 mA6.5 mA6.5 mA
Maximum Output Voltage±10 Vpk±10 Vpk±10 Vpk±10 Vpk
Output Impedance<50 Ohm<50 Ohm<50 Ohm<50 Ohm
Physical
Housing MaterialStainless AlloyStainless AlloyStainless AlloyStainless Alloy
VentingRearRearRearRear
Electrical Connector3-Pin XLR3-Pin XLR3-Pin XLR3-Pin XLR
Mounting Thread (Grid)0.25 - 60 UNS0.5 - 60 UNS0.5 - 60 UNS0.5 - 60 UNS
Size - Diameter (with grid)--
0.79 in
20.1 mm
0.79 in
20.1 mm
0.79 in
20.1 mm
Size - Diameter
0.79 in
20.1 mm
------
Size - Height (with grid)
6.85 in
174.0 mm
6.99 in
177.6 mm
6.85 in
174.0 mm
6.85 in
174.0 mm
Weight
4.96 oz
140.7 gm
6.50 oz
184.2 gm
6.45 oz
183.0 gm
6.45 oz
183.0 gm
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Model Number426A14
 Add to Cart
Price:$810.00 USD
Performance
Nominal Microphone Diameter1/4" or 1/2"
Gain-0.2 dB
Frequency Response (±0.1dB)11 to 100000 Hz
Frequency Response (-3dB)<1.8 Hz
Electrical Noise (A-weight)<2 µV
Electrical Noise (Flat 20 Hz to 20 kHz)<4.5 µV
Distortion (3 V rms input at 1 kHz)<-70 dB
Output Slew Rate11 V/µS
Environmental
Temperature Range (Operating)
-40 to +149 °F
-40 to +65 °C
Temperature Response<0.05 dB
Humidity Range (Non-Condensing)0 to 95 %RH
Humidity Sensitivity<0.05 dB
Electrical
Current Draw6.5 mA
Impedance (Input)20 GOhm
Capacitance (Input)0.25 pF
Impedance (Output)<50 Ohm
Output Voltage±10 Vpk
Physical
Housing MaterialStainless Steel
Size - Diameter
0.79 in
20.1 mm
Size - Length
6.50 in
165.1 mm
Weight
6.23 oz
176.5 gm
Electrical Connector3-Pin XLR
Mounting Thread (Microphone to Preamplifier)0.2244 - 60 UNS