Flat frequency response and a consistent cardioid polar pattern make the CK 91 an ideal tool for applications where good off-axis rejection is required.
The AKG Blue Line Series consists of a family of directional prepolarized condenser capsules and microphone configurations that are all compatible with a single powering/output assembly. Because of the general popularity of the cardioid pattern, the CK 91 cardioid capsule and SE 300 B powering/output assembly are sold as a single unit, the AKG Model C 391 B microphone.
The remaining Blue Line capsules offer the following patterns: CK 92 (omnidirectional), CK 93 (hypercardioid), CK 94 (bidirectional), and CK 98 (shotgun capsule, high directivity). Three additional configurations are available: CK 97-O (omnidirectional lavalier), CK 97-C (cardioid lavalier), CK 97-CVR (cardioid gooseneck with bass roll-off).
The Blue Line Series is suitable for studio, live sound, and a variety of speech reinforcement applications, where the facility for switching capsules is a major advantage. The positive Modulock™ bayonet design allows these changes to be made quickly.
The Blue Line microphones exhibit accurate axial response and uniform pattern control. Self noise and maximum operating levels are exemplary, creating a very wide usable dynamic range for the most demanding operations.
The SE 300 B powering/ output assembly provides for 10 dB of attenuation for operation at high sound pressure levels, as well as a 12 dB/octave low cut below 75 Hz for close usage. A complete line of optional accessories is available including an extension cable for operating the microphone capsule up to 10 ft. (3 meters) from the powering/output module.
Specifications (CK91):
- Polar pattern: cardioid
- Frequency range: 20 to 20,000 Hz
- Sensitivity: 10 mV/Pa (-40 dBV)
- Max. SPL: 132/142 dB (for 1% THD)
- Equivalent noise level (CCIR 468-3): 28 dB
- Equivalent noise level: 17 dB-A
- Signal/noise ratio (A-weighted): 77 dB
- Supply voltage: through SE 300 B
- Current consumption: through SE 300 B
- Connector: bayonet mount
- Finish: dark gray
- Dimensions: 19 dia. x 36/51 mm / 0.7 dia. x 1.4/2 in.
- Net weight: 35 g / 1.2 oz.
- Shipping weight: 200 g / 7.1 oz.
- Foam windscreen included
AKG CK 91 Blue Line Cardioid Capsule (code 20676)
Consistent cardioid polar pattern and good, frequency independent off-axis rejection. Mounts directly on SE 300 B powering unit or connects via 10-ft. (3-m) cable.
£146.14 (inc vat)