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Lectrosonics SMDWB Wideband Beltpack Audio Transmitter

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  • For Broadcast, EFP and ENG Applications
  • Beltpack Transmitter
  • Alternate Recording Function
  • 35 Hz to 20 kHz Frequency Range
  • Runs on 2 x AA Batteries
  • 44 dB of Gain Range
  • For Lavs & Dynamic Mics & Line Levels
  • Selectable High-Pass Filtering
  • Built-In Limiter with 30 dB of GR
  • Flexible Steel-Cable Antenna

The Lectrosonics SMDWB Wideband Beltpack Transmitter can act as a recording device, capturing audio onto microSDHC cards. Paired with a lavalier or dynamic microphone, the transmitter is suitable for ENG (Electronic News Gathering), EFP (Electronic Field Productions), interviews for broadcast TV, and more. Lectrosonics SMDWB Transmitter provides Digital Hybrid Wireless technology, combining 24-bit digital-audio processing with an analog FM radio link to give you the benefits of both worlds, such as fewer dropouts and audio artifacts while maintaining a robust range of operation. The SMDWB transmitter is housed in a machined aluminum case, lending the unit a rugged and dependable shell. Its water-resistant control panel adds to its usability.

Expanding the SMDWB’s functionality is its built-in recording capabilities, for use when transmission is simply not possible due to the conditions of the environment. The recorder operates at 24-bit/44.1 kHz, recording WAV files to microSDHC cards. As a transmitter, the SMDWB supplies an audio frequency range of 35 Hz to 20 kHz, though during recording, that lower value extends down to 20 Hz. You cannot use the transmitter and the recorder simultaneously, but it’s nice to have the option to select between the two. The transmitter includes a flexible steel-cable antenna.

Key Features at a Glance

  • Selectable output power to maximize battery life or operating range
  • 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 three standard frequency blocks
  • Update firmware in the field via microSD card reader
  • Can also be used as a recorder on internal microSDHC memory card
In the Box
  • Lectrosonics SMDWB Wideband Beltpack Transmitter (A1: 470 to 537 MHz)
  • 2 x AA Batteries
  • Limited 1-Year Warranty
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More Information
Product ConditonNew


Wireless Technology Analog/Digital Hybrid UHF
RF Frequency Band A1:
470.1 to 537.575 MHz
Frequency Step Size 25 kHz
100 kHz
RF Channel Scanning Auto-Scan
Encryption None
Modulation F3E


Transmitter Type Bodypack
RF Output Power 25 / 50 / 100 mW
Audio I/O 1 x TA5/Mini XLR 5-Pin Male Input (Lockable)
Included Cable Connector None
Plug-In Power 5 V
Audio Input Level 0.5 to 50 mV (Mic Level)
17 to 1.7 mV (Line Level)
Auto-Level Control No
Recorder Sample Rates WAV:
44.1 kHz (Record)
Recorder Bit Depths 24-Bit
Memory Card Support microSDHC
Audio File Formats Recording:
Bit Rates 144 to 192 kb/s (HD Mono Mode)
288 to 384 kb/s (Split Gain Mode)
Gain Range 44 dB
Signal Processing High-Pass Filter:
35 Hz
High-Pass Filter:
50 Hz
High-Pass Filter:
70 Hz
High-Pass Filter:
100 Hz
High-Pass Filter:
120 Hz
High-Pass Filter:
150 Hz
Frequency Response 35 Hz to 20 kHz
Sync Method IR
Antenna 1 x Flexible Whip, Detachable
Power Requirements Battery
Battery Type 2 x AA (Included)
Approx. Battery Life 11.2 Hours (Alkaline)
Display & Indicators 1 x Backlit LCD (Audio Level, Battery Status, Channel, High-Pass Filter, RF Output Power)
1 x LED (Audio Level, Peak)
Housing Aluminum
Operating Temperature -4 to 122°F / -20 to 50°C
Dimensions 2.4 x 2.5 x 0.6" / 60 x 62.8 x 16.3 mm
Weight 4 oz / 113 g

Packaging Info

Package Weight 1.05 lb
Box Dimensions (LxWxH) 9.9 x 7.85 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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