The TC series (Time Coherent) is designed for recording louder sources such as drums, percussion, amplified instruments and loud sound effects. Microphones in this series allow recording of louder acoustic sources without overloading the preamplifier. They effortlessly handle high sound pressure levels up to 150dB SPL while simultaneously capturing subtle details. The TC series provides all of the same attributes as the QTC series in impulse response, diaphragm settling time and extended frequency response. All models in the TC series have an exceptional flat frequency response and are time coherent, so they sound natural and uncolored. All models are available in matched pairs. The TC20 is great for a wide variety of applications. Many musicians use a matched pair for recording their groups in the studio or during a live performance. The TC20 is priced to fit the working musician's budget.