d:dicate 4015A Stereo Pair with Clips and Windscreens in Peli Case. The ST4015A Stereo Pair with 4015A Wide Cardioid Microphones from DPA is a stereo kit that consists of two matched 4015A Wide Cardioid Microphones, two microphone holders, two windscreens, and a Peli Carrying Case. The microphones are matched within ±1 dB on both frequency response and sensitivity for accurate and matched sonic reproduction. Their wide cardioid pattern is designed to provide a broad angle of pick up while still remaining directional, and allows the 4015As to be used with sources such as piano, guitar, marimba, percussion, and orchestral sections. Wide pickup area and natural sound Ambiance pickup with some directionality Matched within ±1 dB Peli Case transportation and protection DPA Microphones ST4015A Specs Microphone Operating Principle Pressure Gradient Capsule Condenser Diaphragm 0.75" / 19 mm Polar Pattern Subcardioid/Wide Cardioid Performance Frequency Range 20 Hz to 20 kHz Maximum SPL 158 dB SPL Impedance 200 Ohms Load Impedance 2 Kilohms Sensitivity -40 dB Dynamic Range 121 dB Signal-to-Noise Ratio 76 dB A-Weighted Equivalent Noise Level 18 dB A-Weighted25 dB ITU-R 468 THD < 1% CMRR 60 dB Power Operating Voltage 48 V ± 4 V Operating Current Consumption 2.8 mA Physical Operating Temperature -40 to 113°F / -40 to 45°C Operating Humidity 90% Dimensions ø: 0.75 x L: 6.69" / ø: 19 x L: 169.93 mm Weight 5.57 oz / 158 g Packaging Info Package Weight 6 lb