The Lectrosonics SMWB is a wireless beltpack transmitter that can also 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. It 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 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.

Operating in the A1: 470 to 537 MHz band, the transmitter offers selectable outputs to bolster its operating range, specifically among 25, 40, and 100mW. At lower values, the transmitter’s battery life will last longer; at higher values, the operating range is increased, though at the expense of battery life. Lightweight at 2.7 oz, the transmitter boasts settings which make it compatible with dynamic microphones, electret lavaliers, and even line-level sources—so long as they can plug into the TA5M 5-pin input connector.

Input gain adjustment is possible in 1 dB increments for a total range of 44 dB. You’ll also note the low-pass filters, which can be switched to roll off at 30, 50, 70, 120, or 150 Hz to mitigate low-end disturbances. This input section also boasts servo-bias input circuitry proprietary to Lectrosonics, as well as an analog limiter controlled with DSP that, sitting ahead of the mic preamp itself, protects the audio path from overload. With its dual-release envelope, it maintains acoustic transparency, even though it can achieve over 30 dB of gain reduction.

The SMWB utilizes DSP that renders it suitable for use with all Lectrosonics Digital Hybrid receivers, though it is also backward compatible for use with 100 and 200 series transmitters, IFB receivers, and various analog receivers from third-party manufactures. The unit is powered by one AA battery, making use of switching power supplies to offer consistent voltages to its internal circuitry throughout its battery life. One AA battery is included. 

Expanding the SMWB’s functionality is its built-in recording capability, 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 SMWB 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.

Professional Film & TV Applications    2 x M152/5P Omni Lavalier Mics    2 x SMWB Beltpack Transmitters    SRc Dual-Channel Slot-Mount Receiver    SREXT SR Receiver Adapter Kit    Compander-Free Digital Hybrid Audio    Ultra-Lightweight, Water Resistant    Transmitter with Built-In Recorder    Adjustable 25/50/100 mW RF Output Power    4.4-Hr AA Batteries

• 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

Related Questions and Answers

Q: 1. Smart phone spplications

A: The Lectrosonics LR Receiver can be connected to a smartphone using the included 1/8 output cable along with an optional adapter such as the Rode SC4.

Q: 2. Which countryman mic works with the transmitter. LS or LT?

A: Any mic that termnates at a TA5 female connector with work.

Q: 3. It is possible to combine a Lectrosonics L-Series LMb (B1: 537 to 614 MHz) with a UCR 411A?

A: Yes, the LMb transmitter can be used with all Lectrosonics Digital Hybrid Wireless receivers including the UCR411a when the compatibility mode for the transmitter and receiver are both set to the "Nu Hybrid" compatibility mode. Lectrosonics notes that if your receiver does not have Nu Hybrid mode, then set the receiver to the "Euro Digital Hybrid Wireless" compatibility mode.

Q: 4. Does the transmitter come with a belt clip included?

A: The Lectrosonics LMb Digital Hybrid Wireless Beltpack Transmitter does come with a metal belt clip.

Q: 5. Can I buy additional receiver to pair up and have a total connections of 3 receivers to 1 transmitter?

A: Yes. multiple receivers may be used with a single transmitter. Frequency Presets There are 10 presets available for programming in the IFBR1B. The stored frequencies remain in memory during power OFF and even with the battery removed. Use the UP and DOWN arrows to scroll through the previously selected frequencies stored in the IFBR1B and quickly change frequencies for quick communication.

Q: 6. Can you sync multiple transmitters (up to 4) with one receiver?

A: No, the Lectrosonics L Series ZS-LRLT Camera-Mount Wireless Omni Lavalier Microphone System has a single-channel receiver so it can be used with only one transmitter at a time.

Q: 7. Can you use this with a SRa receiver

A: So long as your SRa receiver has the same frequency ranges as the LMb transmitter, the LMb transmitter will work with an SRa receiver.

Q: 8. Hi guys, I would like to know if these transmitters came with the Lectrosonics SMDWBBCSL Spring-Loaded Metal Belt Clip Kit (Antenna Up or Down) or I have to buy them separated. Thanks for the support

A: Please call customer service at 800-821-1121

Q: 9. Is it compatible with Sennheiser G4 transmitter?

A: No it is not. Do not mix and match brands.

Q: 10. Can one transmitter sync to two receivers?

A: Yes