Heil Sound PR 40 Black - Professional Microphone, 28Hz - 18kHz, 600 ohms
Frequency Response: 28Hz - 18kHz. The Heil PR 40 microphone boasts the widest frequency range of any dynamic mic in the Heil PR series. Impedance: 600 ohms balanced. PR40 Studio Microphone. Rear Rejection @ 180° off axis: -40dB.