The C 391 B is a complete system that can be adapted in a very practical and low-cost manner to match the ever-changing requirements of the recording, broadcasting, sound reinforcement and film industries. The sound engineer can choose from a range of microphone modules that can be mixed and matched to create customized studio-quality microphones for every conceivable application.
The AKG SE-300B is a power supply and signal output stage for AKG Blue Line series microphone capsules. The power supply is designed as the back-bone of the Blue Line series, allowing a variety of interchangeable capsules to be used as applications change. The SE-300B is a lightweight, rugged unit with an output stage that preserves the integrity of the audio signal while providing a very low noise floor and high output gain. A preattenuation switch provides extra headroom and eliminates distortion caused by overload when reproducing excessively loud signals. A low frequency roll-off switch reduces low frequency noise caused by wind, ambiance, bad grounds etc. The SE-300B is powered with an external 9 to 52 V phantom power source.
The AKG CK91 is a cardioid capsule with signal characteristics that allow the microphone to be used in a variety of applications. The miniature capsule features a flat wide frequency response of 20Hz to 20kHz allowing smooth accurate signal reproduction without coloration. The cardioid polar pattern is effective in eliminating noise and ambiance at the off-axis sections of the capsule. The result minimizes feed-back and allows the CK91 to be used to spot capture instruments and vocals for sound reinforcement and crucial recording. The CK91 is powered with the AKG SE-300B power supply.
|Acoustic working principle:||Pressure gradient receiver|
|Connector:||Type XLR-3 acc. to IEC|
|Current consumption:||= 2 mA|
|Electrical impedance:||= 200 Ohms|
|Electrical working principle:||Condenser microphone, self-polarized|
|Equivalent sound pressure level:||17 dB-A (acc. to IEC 60268-4 (A-weighted))|
|External dimensions:||19x147mm (0.75x5.79")|
|Field open loop gain (sensitivity):||10 mV/Pa - 40 dBV in re. to 1V/Pa (at 100 Hz)|
|Frequency range:||20 to 20,000 Hz ± 2 dB from nominal frequency curve|
|Housing surface:||Matte Gray|
|Operating Temperature:||-20deg.C to +60deg.C|
|Recommended load impedance:||= 1000 Ohms|
|Relative humidity:||99% (+20deg.C), 95% (+60deg.C)|
|S/N ratio in re. to 1 Pa (A-weighted):||77 dB|
|Sound pressure limit:||80 Pa (132 dB) for 1000 Hz|
|Supply voltage:||9 to 52 V phantom power acc. to IEC 61938|
|Weight:||Approx. 115g (4.06oz)|