CMT 42

Common name: Schoeps CMT 42

Production Status: Discontinued / Vintage

The CMT 42 is a small diaphragm condenser microphone first produced in 1965. It features a single diaphragm omnidirectional capsule. The capsule diaphragm is no longer made of metal but of specially manufactured Mylar for better long-term reliability. These new microphones employ high-quality FET for the first time instead of the previous RF (Radio-Frequency) technology for better linearity and performance. The capsule is fixed via three miniature screws and the contacts as well as the mounts are not compatible with the later Colette series although polarisation voltage (60 V) and performance are similar. It uses a DC-DC amplifier to obtain polarisation voltage for the capsule as well as powering the FET and the transformer-less transistorised output circuit. The microphone is 12 V parallel T-Powered (Tonader). The corresponding Schoeps power supply unit is the NT 41. The microphone has either a 3-pin small Tuchel (D) or XLR-3 M (U) connector. The CMT 3, 4 and 5 series remained in production until the nineteen-eighties.

Electrical Characteristics

Frequency Response
Hz - kHz
Output Sensitivity
mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
20Ω
Recommended Load
0.6kΩ
Powering
T12 Modulation-Lead Powering
Supply Current
0.65 mA
Alternative Powering

Switchable Options

Pad
Filter/EQ

Physical Characteristics

Connector
XLR-3M
Connector notes
3-pin small Tuchel (D) version available
Available Colours
Nickel
Weight
Length
124 mm
Min diameter width
Max diameter
20 mm
Depth

Accessories

Included
Box. SG 20 microphone clamp.
Optional
A 20 shock mount. W 20 windscreen