The JM37 is a very high quality true capacitor microphone with FET impedance converter and transformer output.
The capacitor element is manufactured to the classic 'centre electrode' design which provides smooth extended frequency response without low frequency boominess. Quality is further enhanced by using dynamic feedback actually at the capacitor element. This original technique eliminates distortions which can occur when using this type of microphone for high volume levels.
The capacitor membrane is microfine 'mylar' with gold sputtering, voltage polarized by phantom power.
The microphone body is made of brass with double screening of the transformer. Connection is via screened balanced audio cable with 3 pin XLR connectors.
Technical Info
Dimensions: 137 x 22 mm
Frequency response: substantially flat 25Hz to 20KHz
Sensitivity: 16mV/PA-40+/-2dB (0dB= 1V/Pa 1000Hz)
Recommended load impedance: 200 ohm
Signal to noise ratio: 74dB
Dynamic range: 126dB