The Core Sound Cardioid MI microphones have a frequency response of
from 40 Hz to 18 kiloHertz. They are relatively flat over that range
with the exception of a slight (2 dB) peak between 9 kHz and 12
kiloHertz and a bass response fall off of roughly 6 dB per octave
starting at 100 Hertz.
The Core Sound Cardioid MI microphones are specifically designed to
record extremely loud sounds without distortion.
We match the microphone pair to within one dB of each other.
Sensitivity of the cartridges is approximately -70 dB (0 dB = 1 Volt per
microbar), making them very suitable for recording extremely loud sound
sources without danger of overloading your mic pre-amp. The microphones
have a cardioid pickup pattern, rejecting sounds that are 90 degrees
off-axis by at least 6 dB and at 180 degrees by at least 20 dB (measured
at 1 kHz).
The mics have a dynamic range of over 90 dB and are designed to operate
into a nominal impedance of at least 4.7 KiloOhms. (If you need other
impedances, please contact us.) Their self-noise level is approximately
35 dBA. This is far below the ambient noise level everywhere except in
very quiet recording studios.