Lectrosonics M170XLR - Manual (Page 6)

CONTROLS AND FUNCTIONS (cont’d.)
The XLR MIC JACK (M170-XLR only) is a standard 3-pin audio connector (Switchcraft A3F) that will
accept standard hand-held microphones with balanced or unbalanced outputs. The transmitter may be
plugged directly onto hand-held microphones or worn on the belt when used with lavalier or headset
microphones. The M170-XLR input is designed for best performance with balanced, low impedance
(50 to 600 Ohms) dynamic microphones, but will work with high impedance mics. If your microphone
has selectable impedance, set or wire it for 150 to 200 Ohms, or set it to the "low impedance" position.
Some older types of hand-held dynamic microphones did not have a balanced output. These
microphones will not work properly with the M170-XLR transmitter unless the microphone output is on
pin 2 and pin 3 is connected to pin 1 (audio ground).
The M170-BGO was designed specifically for use by bingo halls. A carrying strap acts as the antenna
and allows the user to wear the unit around their neck. The microphone plugs directly into the top of
the unit. The transmitter is activated by pushing the button on the side panel and holding the button in
while you speak. A standard lavalier microphone can be substituted for the plug-in microphone if you
wish to wear the transmitter on your belt rather than around your neck. When the transmitter is worn
on your belt, the neck strap (the antenna) must not be wrapped around the transmitter.
The M170-CTM is a conference table microphone/transmitter ideally suited for board room applications.
A high quality, very sensitive, omni-directional electret microphone is flush-mounted in the top of the
walnut body and wired internally to an M170 transmitter.
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