The Lectrosonics WM Watertight Belt-Pack Transmitter Lavalier Micfrom Lectrosonics WM Watertight Belt-Pack Transmitter Lavalier Micis designed for wet or dusty environments. It features an O-ring sealed battery compartment and input jack, a compression sealed antenna port, and a gasket sealed control panel and back cover. It can be used when paired with a wireless receiver for capturing audio in broadcast TV, ENG (Electronic Field Productions), and EFP (Electronic Field Production) applications, and more.

Dual AA batteries provide twice the operating time of earlier watertight transmitter designs and the larger membrane switches and control panel have a highly visible backlit LCD, which enhances the user interface. In addition, there are 50, 100, or 200 mW selectable-output power switches to maximize battery life and operating range.

Some other features include servo bias input circuitry with selectable voltage for compatibility with other microphones, and programmable compatibility mode for use with a wide variety of different receivers. The transmitter is enclosed in a machined-aluminum corrosion resistant housing and includes a Lectrosonics M152/WP omnidirectional lavalier mic, a belt clip, an O-Ring kit, and two AA lithium batteries.

For Broadcast, EFP and ENG Applications    Water-Resistant Seals    Selectable 50, 100 & 250 mW Output Power    LCD Interface with Lockout Option    Servo Bias Input Circuitry    Machined-Aluminum Housing    O-Ring Sealed Battery Compartment    Includes M152/WP Lavalier Mic    2 x AA Batteries Included    Belt Clip

The voltage and current requirements of the wide variety of electret microphones used in professional applications has caused confusion and compromises in the wiring needed for wireless transmitters. To address this problem, the Servo Bias input circuit provides an automatically regulated voltage over a very wide range of current for compatibility with all microphones

All wireless links suffer from channel noise to some degree, and all wireless microphone systems seek to minimize the impact of that noise on the desired signal. Conventional analog systems use companders for enhanced dynamic range, at the cost of subtle artifacts (typically “pumping” and “breathing”). Digital systems defeat the noise by sending the audio information in digital form, at the cost of some combination of power, bandwidth and resistance to interference

Digital Hybrid systems overcome channel noise by digitally encoding the audio in the transmitter and decoding it in the receiver, yet still sending the encoded information via an analog FM wireless link. This proprietary algorithm is not a digital implementation of an analog compander but a technique that can be accomplished only in the digital domain, even though the inputs and outputs are analog

The Digital Hybrid design results in a signal-to-noise ratio high enough to preclude the need for conventional pre-emphasis (HF boost) in the transmitter and de-emphasis (HF roll off) in the receiver. This eliminates the potential for distortion of signals with abundant high-frequency information

The low frequency roll-off can be set for a 3 dB down point at 35, 50, 70, 100, 120 and 150 Hz to control subsonic and very low frequency audio content in the audio. The actual roll-off frequency will vary slightly depending upon the low frequency response of the microphone.
Excessive low frequency content can drive the transmitter into limiting, or in the case of high output sound systems, it can even cause damage to loudspeaker systems. The roll-off is normally adjusted by ear while listening as the system is operating

A DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more than 30 dB for excellent overload protection. A dual release envelope makes the limiter acoustically transparent while maintaining low distortion. It can be thought of as two limiters in series, a fast attack and release limiter followed by a slow attack and release limiter. The limiter recovers quickly from brief transients, with no audible side effects, and also recovers slowly from sustained high levels to keep audio distortion low while preserving short term dynamics

Related Questions and Answers

Q: 1. Can this also be used around the waist?

A: Yes, you can use the belt around the waist.

Q: 2. are these compatible with Lectrosonics L Series LR?

A: This transmitter would be compatible with the LR receiver in the A1 band.

Q: 3. Is the silver screw in the picture a 1/4 20? I'm thinking this might work with my PCM-M10. Thank you!

A: No, it isn't that large. I don't have the exact size, though.

Q: 4. Is this mic compatible with Rode Newsshooter kit?. Please kindly adviseThanksChabi

A: Yes. The Senal mic (SEUTM8635H) is wired for Sennheiser transmitters, which are also wired the same way as Rode transmitters.

Q: 5. Does this allow for rotation of the microphone capsule?

A: No it doesn't it secures it safely within the bracket, (ring of wire you see in the picture.)

Q: 6. Does it interfere with the DJI Wireless Mic like the Rode Lavalier Go?

A: The Senal UTM-86-35H Lavalier Mic would not be recommended for use with the DJI Mic because of its locking connector, which has been known to block connection with the DJI Mic's transmitter units.

Q: 7. Is this suitable for fitness instructors? As in, does the material of the belt protect the mic pack from sweat?

A: The material is thick but not waterproof. It's really a large piece of elastic with a velcro closure. Dancers use these in theater shows all the time and are fine, but if you are going all day and regularly sweat through belts I'd protect the mic in a different way.

Q: 8. How large are the mounting screws? I can't find the exact size anywhere. Does anyone have any experience with clips like these? I need a belt clip for my Tascam DR-05.

A: Depends on what you are mounting the clip to.

Q: 9. Is it compatible with the Sennheiser FreePort lavalier kit?

A: Theoretically, yes. The Sennheiser Freeport wireless system is no longer available and as such cannot be tested with current products. Nonetheless, the wiring on the Freeport is the same as the EW wireless systems- and the UTM-86-35H is designed to work specifically with the Evolution Series wireless system. There should be no issue.

Q: 10. Is this the length of the belt, not waist size?

A: The 32'' is the length of the belt.