The Lectrosonics SMWB/E07-941 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 941 to 959 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/E07-941 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/E07-941’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/E07-941 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.

For Broadcast, EFP and ENG Applications    Digital Hybrid Wireless Technology    Alternate Recording Function    35 Hz to 20 kHz Frequency Range    Runs on 1 x AA Battery (Included)    44 dB of Gain Range    For Lavs, Dynamic Mics, or Line Levels    Selectable High-Pass Filtering    Built-In Limiter with 30 dB of GR    Flexible Steel-Cable Antenna

• 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. what is the matching reciever?

A: The Lectrosonics SMQV Super Miniature Wireless Microphone Transmitter is compatible with any Lectrosonics Digital Hybrid receiver in the correct frequency block, such as BH #LEUCR411A21.

Q: 2. What is the expected runtime for the SMDWB on Eneloop Pro 2450s and Energizer Lithium (the data sheet only shows Alkaline, which seems possibly incorrect)?

A: The battery run time for the Lectrosonics SMDWB with AA lithium, disposable batteries is. At 50 mW (2 x AA): 14.5 hours and at 100 mW (2 x AA): 14 hours.

Q: 3. this unit come with one 3.7V battery or two?thanks.

A: One.

Q: 4. what is the smqv connector? is TA3M? or TA5M?

A: The connector is a TA5.

Q: 5. Am I able to use the lectrosonics IFB to tune into this transmitter? I didn't see an IFB mode.. just DHCT and DUET mode.

A: This unit is not compatible with the IFB model receivers. For an IFB receiver, you'd need a version of their IFBT4 transmitters in the corresponding frequency as the receiver. Such as this B&H # LEIFBT421.

Q: 6. I'm looking for the G2-C (518 to 554 MHz). I haven't had any luck. Does any here know where I can find it?

A: Yes, 518-554 is A band, not C as Gerald said. The antennas are the same between G2 and G3, requiring partial disassembly to reach a solder point internally. You can mix and match G2 and G3 equipment, but turn off the 'pilot' function on the G3. G3 stuff is still available, even though Sennheiser is on to G4 now.

Q: 7. I have a lot of Sennheiser lavs with a 3.5mm connector. Is there an adapter that will connect my Sennheiser mics to the 3 pin lemo of this receiver?

A: Unfortunately there would be no adapters available to connect a lavalier wired with a Sennheiser mini jack to connect with a Lectrosonics transmitter.

Q: 8. How long can this mic stay in standby mode if using a lithium battery?

A: I'm not sure about standby mode but I've gotten 3.5-4 hours out of use out of the thing. I always use lithium batteries. Energizer makes two different ones though: Advanced which they say lasts up to 6 times longer and Ultimate which they say lasts up to 9 times longer. Great mic!

Q: 9. Will this also work for a G2 EW-100? (the older model)

A: Yes, im fairly sure it will work. I used this part to replace the antenna on a Sennheiser receiver which I am guessing was the same model as yours the first EW100 that took two AA batteries instead of a single 9v. No problems as far as I can recall. Good luck.

Q: 10. Does this transmitter work with the Lectrosonics IFBR1B Bodypack IFB Receiver (VHF: 174 to 216 MHz) ? I noticed the frequency range was slightly different so i want to be sure.

A: Yes, The Lectrosonics IFBR1B is compatible with IFBT4 transmitters, as long as there is frequency band overlap between the components