The QTC Series (Quiet Time Coherent), which includes this QTC30 small-diaphragm omnidirectional condenser mic, is designed for recording quieter sources such as vocals, strings and distant miked orchestras or choirs. These low-noise omnis are also an excellent choice for drum overheads, close-miked wind and percussion instruments. Earthworks' reputation for realism is based on these distinctive omnis. Time Coherent Response means these models do not smear the time domain as most microphones do.