Description

C391B AKG - High performance condenser microphone

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 customised studio-quality microphones for every conceivable application.

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. The C 391 B system consists of a universal powering/output module (SE 300 B), several microphone capsules and readily-interchangeable accessories to suit all types of application. The microphone is virtually unaffected by handling noise due to its lightweight diaphragm. Additional features include the all-metal housing, which makes it less susceptible to HF interference, as well as its trouble-free operation in almost all situations due to its conservative and reliable design.

The switchable 10 dB attenuation of the output signal is a major benefit at high sound pressure levels (i.e. high-powered sound sources) and when the input stages of amplifiers or mixing desks have lower maximum input levels. If this option was not available, these connected stages would be overamplified without being able to fully control the microphone. The switchable bass cut filter of the microphone also helps to suppress low-frequency distortion, such as rumble or wind noises, that cannot be controlled. The filter slope is approx. 12 dB/octave with the corner frequency (-3 dB point) lying at approx. 75 Hz.

Scope of supply

• SE 300 B powering/output module
• CK 91 microphone capsule with frequency-independent, cardioid polar pattern
• W 90 foam wind guard
• SA 60 universal tripod connector

Special features

• Robust design
• Minimal self noise
• Low power consumption
• Extremely reliable
• Low-impedance capsule connection
• Works without any problems up to 60°C and 95% relative humidity
• Integrated, switchable 10 dB attenuation of gain (see fig.)
• Extremely durable
• Transformerless output stage
• Can by powered by any phantom powering device that complies with IEC 61938
• Low distortion, even at high sound pressure levels
• Integrated bass filter with onset at approx. 100 Hz (see fig.)
• 14 C

Specifications