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Lectrosonics SMWB Single AA Transmitter B1 Freq 537-614

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Lectrosonic SMWB Digital Hybrid Wideband Transmitter, SM Series Single AA version. B1 Freq 537.600-614.375

To meet the demand for both extended operating range and extended battery life, the “WB” series SM transmitters offer selectable output power of 25, 50 and 100 mW. With higher power output, the operating range is improved at the expense of battery life. When range is not an issue, a lower power level can be used to extend the battery life.

The transmitters offer hands free setup and adjustment using audible tones. They can be put to sleep to conserve battery power during setup while buried inside costuming, then awakened for normal operation when the production begins. Other features include input gain adjustment in 1 dB increments over a 44 dB range and adjustable low frequency audio roll-off for 3 dB down points at 35, 50, 70, 100, 120 or 150 Hz to control subsonic and very low frequency audio content.

The Lectrosonics SMWB & SMDWB at Talamas

Nick and Mike explain how the new wave of wireless transmitters from Lectrosonics can have a big impact on your productions. We eat, breath and sleep wireless audio, so we're just a little thrilled to offer them in our sales and rentals lineups. The Lectrosonics SMWB and SMDWB transmitters solves the issues of finding a open RF frequency to transmit on and having a portable recorder for your talent to wear.


The DSP-based design works with all Digital Hybrid receivers, and is backward compatible for use with Lectrosonics 200 and 100 Series, IFB receivers and some analog receivers from other manufacturers in addition to its native Digital Hybrid Wireless® operating mode.
The input section features the unique Lectrosonics servo bias input circuitry with a standard TA5M type jack for use with electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed ahead of the first mic preamp to protect the entire audio chain from overload. The limiter has a range of more than 30 dB for excellent overload protection, and a dual release envelope that makes the limiter acoustically transparent while maintaining low distortion of brief transients and longer duration peaks.


A water resistant control panel with LCD, membrane switches and multi-color LEDs make input gain adjustments, frequency and compatibility mode selection quick and accurate. The battery compartment accepts lithium AA batteries.
The SMWB housing is machined from solid aluminum blocks to provide an extremely lightweight and rugged package. A special non-corrosive finish resists salt water exposure and perspiration in extreme environments.

Alternate Recording Function
Instead of transmitting, the SMWB may also be used as a recorder. The industry standard .wav (BWF) file format is compatible with essentially any audio or video editing software.
NOTE: The transmitting and recording functions cannot be done simultaneously. Users must choose to transmit or record.

Frequency Tuning Range
RF-intense multichannel and mobile venues must have a broad selection of frequencies available to alleviate interference problems, especially with the emergence of DTV telecasts. 3072 frequencies are selectable in 25 or 100 kHz steps across the broad tuning range of each frequency band.


• Selectable output power to maximize battery life or operating range
• Ultra-lightweight, corrosion resistant housing
• Water resistant seals for use in damp environments
• LCD interface with lockout option
• Programmable compatibility modes for use with a wide variety of different receivers
• Servo Bias input circuitry
• IR (infrared) port for fast setup
• Covers 3 standard frequency blocks
• Update firmware in the field via Micro SD card reader
• Alternate use as recorder on internal microSDHC memory card

Product Specification

Lectrosonic SMWB Digital Hybrid Wideband  transmitter, SM Series Single AA version. B1 Freq 537.600-614.375

Channel Spacing: Selectable; 25 or 100 kHz
Frequency selection: Control panel mounted membrane switches
RF Power output: Switchable; 25, 50 or 100 mW
Compatibility Modes: Digital Hybrid Wireless® (NU Hbr),
200 Series, 100 Series, Mode 3, Mode 6, IFB
Pilot tone (Digital Hybrid Mode): 25 to 32 kHz; 5 kHz deviation
Frequency stability: ± 0.002%
Deviation: ± 75 kHz max. (Digital Hybrid Mode)
Spurious radiation: Compliant with ETSI EN 300 422-1
Equivalent input noise: –125 dBV, A-weighted
Input level:
If set for dynamic mic: 0.5 mV to 50 mV before limiting
Greater than 1 V with limiting
If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting
Greater than 5000 uA (5 mA) with limiting
Line level input: 17 mV to 1.7 V before limiting
Greater than 50 V with limiting
Input impedance:
Dynamic mic: 300 Ohms
Electret lavaliere: Input is virtual ground with servo adjusted
constant current bias
Line level: 2.7 k ohms
Input limiter: Soft limiter, 30 dB range
Bias voltages: Fixed 5 V at up to 5 mA
Selectable 2 V or 4 V servo bias for any electret
Gain control range: 44 dB; panel mounted membrane switches
Modulation indicators: Dual bicolor LEDs indicate modulation
–20, -10, 0, +10 dB referenced to full modulation
Controls: Control panel w/ LCD and 4 membrane switches

Lectrosonics Introduces SM Series Wideband Transmitters


Lectrosonics Introduces SM Series Wideband Transmitters


Lectrosonics Introduces SM Series Wideband Transmitters