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Lectrosonics SSM Digital Hybrid Wireless Miniature Audio Transmitter (A1: 470.100 to 537.575 MHz)

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  • For Theater, Live Stage, TV, & Film
  • 24-Bit Digital Audio with Analog FM Link
  • 35 Hz to 20 kHz Frequency Response
  • 25 or 100 kHz Tuning Steps
  • Up to 3,072 Selectable Frequencies
  • Wide Range Input Gain Control
  • LED Indicators
  • Compatible with Analog Receivers
  • Runs on Rechargeable Lithium-Ion Battery
  • Includes Belt Clip and Battery Charger

The Lectrosonics SSM Digital Hybrid Wireless Miniature Transmitter (A1: 470.100 to 537.575 MHz) is a miniature Lectrosonic Digital Hybrid Wireless Transmitter with selectable frequencies across a maximum tuning range of 76.7 MHz and has a selectable 25 or 50 mW RF output power. The SSM Hybrid Mini Transmitter can be used in applications where concealment in costuming is required or any other production such as for live stage, theater, houses of worship, reality TV, and more.

The SSM features selectable frequencies in 100 kHz or 25 kHz steps yielding a total of 3,072 available frequencies across three standard frequency blocks. Its lithium-ion battery provides power and sits in a stainless-steel battery door that latches closed and cannot be jarred open accidentally.

  • The SSM transmitter tunes across a range of over 76 MHz. This tuning range covers three standard Lectrosonics frequency blocks
  • The transmitter operates from a 3.7V rechargeable battery that will provide about four hours of operation per charge
  • The factory-supplied battery charger provides a folding NEMA 2-prong plug, and will operate from 100-240 VAC sources. The LED glows red during charging and turns green when the battery is fully charged
  • The LCD is a numeric-type Liquid Crystal Display with screens for adjusting output power, frequency, audio level, low frequency audio roll-off, and various modes and options
  • The antenna is a flexible whip made of galvanized steel, permanently attached to the transmitter to prevent damage from heavy use. The IR port is capped with a translucent dome material to broaden the reception angle. The input jack is a rugged 3-pin LEMO connector with a threaded locking sleeve
  • An infrared sync port on the SSM allows for quick setup with compatible receiver systems. A micro-B USB port makes it possible for firmware updates in the field as advanced features are added in the future
  • The SSM responds to remote commands for frequency, audio level, sleep modes, and other settings from the RM remote unit or 3rd party smartphone apps
In the Box
  • Lectrosonics SSM Digital Hybrid Wireless Miniature Transmitter (A1: 470.100 to 537.575 MHz)
  • Removable Belt Clip
  • 3.7V Lithium-Ion Battery Pack
  • Battery Charger
  • Limited 1-Year Warranty
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Product ConditonNew


Operating Frequency A1: 470.100 to 537.575 MHz
Frequency Selection Steps Selectable; 100 kHz steps or 25 kHz
RF Power Output Switchable; 25 or 50 mW
Pilot Tone 25 to 32 kHz; 5 kHz deviation (Digital Hybrid mode)
Frequency Stability ± 0.002%
Deviation ± 75 kHz max. (Digital Hybrid mode)
Spurious Radiation 60 dB below carrier
Equivalent Input Noise -120 dBV, A-weighted
Input Level Nominal 2 to 300 mV, before limiting
Greater than 1 V maximum, with limiting
Input Impedance Mic: 300 or 4.5 kOhms; selectable
Line: Greater than 100 kOhms
Input Limiter DSP controlled, dual envelope "soft" limiter with greater than 30 dB range
Gain Control Range 44 dB; digital control
Modulation Indicators Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation

Audio Performance

Frequency Response 35 Hz to 20 kHz (+/-1 dB)
Low Frequency Roll-Off -12 dB/octave; 70 Hz
Total Harmonic Distortion (THD) 0.2% (typical)
Signal to Noise Ratio At Receiver Output:
SmartNR Off: No limiting 103.5, w/limiting 108.0
SmartNR Normal: No limiting 107.0, w/limiting 111.5
SmartNR Full: No limiting 108.5, w/limiting 113.0

Note: The dual envelope "soft" limiter provides the handling of transients using variable attack and release time constants. Once activated, the limiter compresses 30+ dB of transmitter input range into 4.5 dB of receiver output range, thus reducing the measured figure for SNR without limiting by 4.5 dB
Controls Side-panel membrane switches with LCD interface for power on/off and all setup and configuration controls
Responds to remote commands from smartphones with 3rd party app.
Audio Input Jack LEMO 00 series 3-pin
Antenna Galvanized steel, flexible wire
Batteries Lithium-ion 3.7 V 1000 mAH NP50 battery pack
Battery Life 6 hours per charge
Emission Standard 180KF3E
Dimensions 2.3 x 1.5 x 0.56" (58.4 x 38 x 14.2 mm)
Weight 2.3 oz (65.2 g) including lithium battery pack

Packaging Info

Package Weight 1.2 lb
Box Dimensions (LxWxH) 9.9 x 7.9 x 3"
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
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