Common name: Schoeps CMT 22
Production Status: Discontinued / Vintage
The CMT 22 is a phantom powered small diaphragm transistor microphone first produced in 1964. It features a metal diaphragm capsule with an omnidirectional polar response exhibiting a gentle high frequency rise for diffuse-field pickup. It uses a radio-frequency circuit in which the capsule modulates a 3.7 mHz radio-frequency carrier to produce an output voltage and a transformer-less output stage with coupling capacitors. The microphone is insensitive to temperature up to + 70° Celsius, moisture, electric and magnetic fields. The CMT 20 series is powered by 8.5 V phantom power.