Condenser drum microphone The SM98 is a miniature electret condenser microphone with a unidirectional (cardioid) pickup pattern. A smooth wide frequency response from 40 to 20,000 Hz allows the microphone to be extremely well adapted to pick up allkinds of musical instruments. A detachable 4.6m (15 ft)cable with Switchcraft Tini Q connectors and a battery or 48v (phantom) powered preamplifier are supplied with the microphone.