AKG C 391 B features the ability to quickly interchange capsules with different characterisitics, making it an excellent mic for many applications.

The C 391 B is a quiet mic with very good transient response and a polished sound. Produces a full bottom end when used with instruments.

The C 391 B is a cardioid condenser microphone combination with a switchable bass roll off/attenuator with 3 positions: flat, 75Hz and -10db attenuation. It consists of a powering module, cardioid capsule, foam windscreen, stand adaptor and foam-lined case.