Barcus Berry 3000AE Piezo Buffer Preamp w/ EQ

Specifically designed to work with all Barcus-Berry electret microphone systems. Features external bass, treble and volume frequency controls to allow a wide range of adjustment. Includes a belt clip for unrestricted movement. Product Specifications: Input (EQ) Flat Input Interface: RCA unbalanced Input Impedance: 2.2 Meg Ohms Maximum Input Level: 2.0 vrms Output (EQ Flat, Volume Max) Interface: 1/4" unbalanced Impedance: 2K Ohms THD: .008% @ 1kHz Noise: -92dBu S/N: 100dB Bass: +/- 12dB @ 50Hz Treble: +/- 12dB @ 10kHz Frequency Response: 5 Hz - 30kHz (+/- 1 dB) Power Supply Power Source: 9 volts @ 380 microamps Battery Life: Approximately 1,000 hours