CRY509 Preamplifier outputs through a 4 pin aviation plug, with the characteristics of high input impedance, low output impedance, lower noise, wide frequency response range, etc. It is usually combined with CRY300 series 1/2-inch measurement microphone to transform impedance and amplify acoustic signal. It is also compatible with other 1/2-inch measurement microphone like G.R.A.S. and B&K. The stainless steel material guarantees its good toughness and longtime preservation. It can be used for conditions like electroacoustic test or multi-noise analysis. Frequency Range Input Impedance Output Impedance Power Supply Dual Power ±3V ~ ±10V, <1mA Single Power +5V ~ +20V, <1mA Noise, A-Weighting Noise, linearity(20-20KHz) Connector Type Aviation Plug(Include an aviation plug to DB9 cable) Diameter(without connector) Height(include base) Add: No.31-1, Xianxing Road, Xianlin Industrial Park, Yuhang District, Hangzhou, Zhejiang