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.

The C391 B provides a switchable bass roll-off/attenuator with three positions: flat, 75Hz and 10db attenuation

General

Audio Frequency bandwidth	20 to 20000 Hz
Sensitivity	10 mV/Pa
Equivalent Noise Level	17 dB-A
Signal to Noise	77 dB-A
Preattunation Pad	10 dB
Bass Cut Filter	75 Hz
Recommended Load Impedance	1000 Ohms