The Cardioid Microphone Type 4012 is a hi-voltage (130 V) condenser microphone with a linear frequency response from 40 Hz to 20 kHz (±2 dB) and SPL handling of 168 dB SPL.
Type 4012 is acoustically identical with the popular Type 4011-TL, but differs in the powering method which enables the 4012 to handle these extreme sound pressure levels. The off-axis characteristics of the 4012 Cardioid Microphone are totally linear, a unique quality which has taken a lot of attention to obtain. So any leakage that occurs from off-axis sound sources is still a faithful reproduction of these sounds, though attenuated according to the true first order cardioid pick-up pattern.
Directional characteristics: Cardioid
Principle of operation: Pressure gradient
Cartridge type: 19 mm (0.75 in) pre-polarized condenser
Frequency range, ± 2 dB: On-axis: 40 Hz - 20 kHz
Sensitivity, nominal, ±2 dB: 12 mV/Pa; -38 dB re 1 V/Pa