Reference Standard, Cardioid Kit (4011A) with Accessories. Reference Standard, Cardioid Kit (4011A) with Accessories. The 3511A Stereo Kit with 4011A Cardioid Microphones by DPA is designed for use when capturing instruments or vocals in recording and live sound reinforcement applications. The 3511A kit includes two frequency-matched 4011A cardioid microphones, two UA0897 shockmounts, two UA0896 foam windscreens, two UA0961 microphone holders, one DUA0019 spacer for stereo boom, and one UA0837 stereo boom excluding holders. The 4011A cardioid microphones are matched within 1 dB on frequency response, sensitivity, and self-noise. These cardioids are linear in their frequency response and allow for several different setups, such as ORTF and XY configurations. The microphones can handle high SPL for both close-miking and distant placement. The 3511A kit can be used for piano recordings of jazz or pop or as an overhead for drums and other instruments. Cardioid pickup pattern provides maximum separation between sound sources Equally suitable for close-up work on acoustic guitar, grand piano, overheads, percussion, wind instruments, and vocals Flat on-axis frequency response and high-quality phase response 20 dB pad switch in the center of the XLR connector to attenuate the output of the microphone DPA Microphones 3511A Specs Microphone Form Factor Stand/Boom Mount Intended Sound Sources Vocals, Acoustic Guitar, Piano, Percussion, Overhead, Woodwinds, Flute, Orchestra, Room Ambiance Operating Principle Pressure Gradient Capsule 1 x Condenser Diaphragm 0.75" / 19 mm Polar Pattern Cardioid High-Pass Filter None Gain Adjustment None Windscreen Foam (Included) Performance Frequency Range 20 Hz to 20 kHz Maximum SPL 159 dB SPL Impedance 200 Ohms Load Impedance 2 Kilohms Sensitivity -40 dB at 1 kHz 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 Operating Current Consumption 2.8 mA Physical Color Black Mounting Floor Mic Stand (with Included Hardware) Included Case None Included Filters None Operating Temperature -40 to 113°F / -40 to 45°C Operating Humidity 90% Dimensions ø: 0.75 x L: 6.7" / ø: 19.05 x L: 170.2 mm Weight 5.57 oz / 158 g