LM/IM
LECTROSONICS, INC.
10
Sanken Cos-11 microphones, the Lectrosonics M150
and other three wire microphones to be used with the
SM will require new wiring. If the wiring is not changed,
they will have much higher output than usual and extra
distortion at high levels. The reason is that the source
follower wiring used with the UM200 and UM400 series
is not compatible with the SM virtual ground input. In
the “Compatible with SM Series and other Lectroson-
ics Transmitters” section shows a compatible wiring
that will work with all 5-Pin Lectrosonics transmitters.
This wiring converts the three wire microphone to a two
wire system without changing the audio quality. (The
microphone polarity will be reversed so you may want to
enable the phase switch on the Lectrosonics receiver.)
This wiring is electrically equivalent to the easy wiring in
the “Works with SM only” section.
All two wire mics (except the Countryman B6 and E6)
such as the MKE-2 and the Lectro M152 will work with
the SM with no changes. The two wire setup is shown
in the third diagram in the “Compatible with SM Series
and other Lectrosonics Transmitters” section.
Wiring Hookups for Different Sources
In addition to the wiring hookups illustrated below, Lec-
trosonics makes a number of cables and adapters for
other situations such as connecting musical instruments
(guitars, bass guitars, etc.) to the transmitter. These
cables can be found in our UHF or Accessories cata-
logs. Visit www.lectrosonics.com, or contact the factory
for more information.
In the LMA Series, there is a new input circuit where pin
4 is now a voltage selector pin. The diagrams in the sec-
tion labeled “Works with SM only” are specific to the SM
transmitter and make wiring a Countryman B6 or E6 or
a three wire microphone such as a COS-11 very quick
and easy. However, these wirings won’t work with older
Lectrosonics transmitters such as the UM400, UM200,
etc. If you need the two wire Countryman B6 or any three
wire mic to work with both older transmitters as well as
with the SM go to the section below, labeled, “Compat-
ible with SM and other Lectrosonics Transmitters.”
Works with Servo Input Only:
Compatible with SM Series and other Lectrosonics Transmitters:
SHIELD
TIP
PIN
5
4
3
2
1
SLEEVE
LINE LEVEL
RCA or 1/4” PLUG
A UDI O
1
2
3
4
5
T A5 F
PLUG
(This configuration handles input signal levels up to 3 V or
12 dBu before limiting and is fully compatible with other Lectrosonics
transmitters such as the LM or UM series. A 20 k resistor can be inserted
in series with pin 5 for additional 20 dB attenuation (30 V or +32 dBu).)
Compatible Standard Unbalanced Line Level Wiring