The DPA ST4011A is a complete DPA 4011A Stereo Pair with two carefully factory-matched first order cardioid microphones. Even though the standard tolerances on DPA Reference Standards are extremely low, a stereo match is even closer. The specially selected DPA 4011A microphones are matched within ±1 dB on both frequency response and sensitivity. The foam design in the heavy-duty transportation box allows for fast and easy exchange of microphone/accessory inlay. 4011A cardioids are exceptionally linear in their frequency response – also off axis, giving you the natural experience. They handle extremely high SPL and will therefore allow for close placement and are often used for piano recordings with a placement closer to the hammers or as overheads for drums. The main features of the ST4011A include: Carefully matched 4011A microphones World-wide cardioid reference mic Handles very high sound pressure levels Carefully matched within ±1 dB Peli Case transportation and protection Included in this kit: 2 x 4011A microphones, sturdy Peli case, holders, and windscreens Directional characteristics: Cardioid Principle of operation: Pressure gradient Cartridge type: Pre-polarized condenser Frequency range: 20 Hz to 20 kHz Max. SPL, peak before clipping: 159 dB Weight: 158 g (5.6 oz) Microphone diameter: 19 mm (0.75 in) Capsule diameter: 19 mm (0.75 in) Length: 170 mm (6.7 in)