The QTC series (Quiet Time Coherent) is designed for recording quieter sources such as vocals, strings and distant miked orchestras or choirs. Earthworks' reputation for realism is based on these distinctive omnis. Their degree of clarity is unparalleled. Our claim of Time Coherent Response means these models do not smear the time domain as most microphones do. Earthworks microphones have exceptional impulse response and diaphragm settling time. QTC microphones handle sound levels up to 142dB with no proximity effect or handling noise. All models are available in matched pairs. The QTC30 is an economical alternative to our popular QTC40 (same as the QTC1). Its 30kHz high frequency response and small size make it ideal for capturing high quality sound where space is a concern. The QTC30 is an excellent choice in cost vs. performance.