Microphones of this second transistorized generation offered six types of capsule (MKT 2, 4, 40, 41, 5 and 6) and were available for 12-Volt phantom powering (CMT 30), 12-Volt parallel powering (CMT 40) and 48-Volt phantom powering (CMT 50). The 12-Volt CMT microphones were superseded by the Colette series in 1974, but because of its extremely low current consumption, the CMT 50 series continued to be offered through 1982.