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The AKG C 391B is a High performance condenser microphone. The microphone has a cardioid polar pattern, a low self-noise and very good transient response.

The C391 B high-performance small-diaphragm condenser microphone is a combination of the Blue Line Series CK91 and the SE300 pre-amplifier. The microphone has a cardioid polar pattern, a low self-noise and very good transient response for a bright and brilliant sound. It also features the ability to quickly interchange its capsule with one of the other capsules of the Blue Line Series, making it an excellent mic for demanding broadcast applications.


Precise cardioid polar pattern
for uncolored sound quality and high gain before feedback
Switchable attenuation pad
enables high-SPL applications up to 144dB
Switchable bass-cut filter
eliminates rumble or footfall noise
Universal phantom powering from 9 to 52V
for operating with phantom power supply
Carefully handcrafted in Vienna, Austria
meticulous attention to detail ensures highest quality


Audio Frequency bandwidth: 20 to 20000 Hz
Sensitivity: 10 mV/Pa
Equivalent Noise Level: 17 dB-A
Signal to Noise: 77 dB-A
Preattenuation Pad: 10 dB
Bass Cut Filter: 75 Hz
Recommended Load Impedance: 1000 Ohms
Polar Patterns
Powering Interface
Voltage: 9 to 52 V
Current: 2 mA
Audio Output
Type: Balanced XLR
Gender: Male
Contacts: 3-pin
Finish: dark gray
Dimensions / Weight
Height: 146 mm
Diameter: 19 mm
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