Specifications

39
Microphone Amplifier for Pocket Transmitters
COLETTE
modular
Microphone Amplifier for Pocket Transmitters
CMR
– specially designed for using SCHOEPS ”Colette”-
series microphone capsules with pocket transmitters
– low power consumption: only about 1/20 to 1/50
that of a phantom-powered microphone
– low-impedance, unbalanced output
A SCHOEPS Colette-series condenser microphone nor-
mally consists of a CMC microphone amplifier plus
one of the many available types of SCHOEPS Colette-
series microphone capsule, operating from a source of
12-Volt or 48-Volt phantom powering. However, such
powering is not available when the microphone is used
with a pocket transmitter, as is often the case in film
and television production. In this situation the CMR
microphone amplifier can be used. It allows any
SCHOEPS ”Colette” series capsule (except the BLM 03 C
active boundary layer capsule) to be used with pocket
transmitters. As with electret microphones only a very
low supply current is required, yet the CMR offers low
output impedance and good immunity to interference.
The biggest benefit of all, however, is SCHOEPS' well-
known sound quality, which this amplifier delivers fully.
The robust connecting cable is reinforced with Kevlar
fibers. It remains flexible at low temperatures, and does
not twist.
What types of equipment can the CMR be used with?
If the input of the equipment provides 1 mA for a
micro phone at 4 Volts or higher, the equipment should
be suitable.
The current list of compatible devices is available on
www.schoeps.de/data/CMR-compatibility.pdf. At the
time of publication of this catalog, the following
models were on this list:
Audio Ltd.: MiniTX, TxiR, TX200+Envoy
Lectrosonics: SM “+10”, UM 300 B, UM 500
Shure: UHF U1, UHF U1L, UHF ULX1
Technical Specifications:
Operating voltage: 4 - 10 Volts DC
Current requirement: ca. 1 mA
Sensitivity: ca. 0.6 times the value as measured with a standard CMC microphone ampli-
fier. For example with the MK 4 cardioid, the sensitivity is about 8 mV/Pa, the
maximum sound pressure is 130 dB SPL and the equivalent input noise is
29 dB CCIR** or 18 dB A-weighted*.
Frequency response: The frequency response characteristic will be that of the capsule which is chosen.
Maximum output voltage: 900 mV with 20 kOhm load impedance (ca. -1 dBV)
560 mV with 2 kOhm load impedance (ca. -5 dBV)
Output impedance: 15 Ohms at 1 kHz
Length: 38 mm (not counting rubber cable bushing and capsule)
Diameter: 20 mm
Weight, without cable or capsule: 25 g (0.88 oz.)
Length of the output cable: 2 m standard; other lengths possible
Diameter of the output cable: 3 mm
Output connector: The connector is wired to the customer's specifications.
Sennheiser: SK 50 (not SK5212)
Micron: TX 700, TX 716A
Wisycom: MTP 22
If in doubt, simply ask your SCHOEPS representative or
dealer.
Output cable
In many cases you would only have to tell us the type
of equipment and the desired cable length. We could
then make up an output cable for you with the proper
wiring and plug.
Lead arrangement of the two-conductor shielded cable:
Shield: ground (both signal and powering)
Blue: + pole of the power supply
White: audio output
Standard surface finish: matte gray (g)
Accessories (included): polished wood case
CMR, actual size
New!
*IEC 61672-1
**IEC 60268-1