The AT4060a Cardioid Condenser Microphone is designed for use in demanding studio applications. The tube is hand-selected, individually aged and tested, then employed in a uniquely configured circuit for enhanced tube performance. Specially tuned elements improve the dynamic range and the allow the AT4060a to handle high SPLs without sacrificing high-frequency characteristics. Floating-construction mounting of the elements provides isolation from noise and vibration. The AT4060a operates in conjunction with the included tube microphone powering unit, featuring low-impedance output and a ground-lift switch.