C3000 High-performance large-diaphragm condenser microphone The C3000 high-performance, large-diaphragm condenser microphone has been a standard for live applications and studio recording for almost two decades. C3000 High-performance large-diaphragm condenser microphone The C3000 high-performance, large-diaphragm condenser microphone has been a standard for live applications and studio recording for almost two decades.