AKG C 451C with CK 9 capsule | soloist microphone

This AKG C 451-C was built in 1969. With the built-in CK-1 capsule, it was AKG's first small-diaphragm condenser microphone using low-noise FET technology. Appreciated by sound engineers, the balanced frequency response and modular design contribute to its widespread adoption. The "CMS" (Condenser Modular System) continued into the 1990s, when AKG replaced this system with a new model series, dubbed the "C 451 B". The directional microphone with a cardioid characteristic has a very balanced, linear frequency response over a wide range. At around 12 kHz there is a slight increase, which makes it particularly popular for recording instruments with a large treble component, for example drum cymbals. But it is also used for guitar, strings, harp, grand piano and percussion instruments. It is often chosen especially for outdoor applications, as the permissible operating temperature range is from -20 to +60°C. In conjunction with the supplied CK9 capsule, the C451 C becomes an extremely directional microphone with a "lobe" directional characteristic. Of course, we tested the microphone and found no errors.

Technical data:
Polar pattern: cardioid (with CK9 capsules > lobe)
Frequency range: 20 to 20000 Hz
Sensitivity: 9mV/Pa
Signal to noise ratio: 76 dB-A
Limit sound pressure level: 155 dB SPL
Pad: -10dB/ -20dB
Bass cut: 75 / 150 Hz
Phantom Power: 9-52V
Output Impedance: 200 ohms