The C-ducer (Capacitive-trans-ducer) is a contact condenser microphone. It is light in weight so as to minimize interference with the vibration of the instrument to which it is attached, and it has a phenomenal dynamic range (the transducer itself has a dynamic capability of >155dB) and can handle the amplitudes within a bass drum without distortion.
The frequency response of the transducer is an incredible 0.1Hz to 1MHz, although this is deliberately restricted within the preamplifier to minimize induced noise and interference. Two lengths of C-ducer tape are available, 3 (7.5cm) and 8 (20cm). The shorter length is suitable for smaller instruments (violin, folk harp, banjo etc), and the longer tape is designed for other acoustic stringed instruments (double-bass, ,cello, acoustic guitar etc), drums and piano.