Lectrosonics WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 20)

Lectrosonics WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 20)

Lectrosonics WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 20)

B&H # LEWM20 MFR # WM-20
Lectrosonics WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 20)

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Expected availability: 2-4 weeks

Product Highlights

  • Frequency Block 20
  • Water Resistant Seals
  • Digital Hybrid Wireless Technology
  • Variable, Selectable Power Output
  • 256 Synthesized UHF Frequencies
  • Servo Bias Input with Selectable Voltage
  • Corrosion-Resistant Aluminum Housing
  • Compatibility Modes for Versatile Usage
  • LCD Interface with Lockout Option
  • Lasts Over 14hrs on Lithium AA Batteries
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This item is noncancelable and nonreturnable.

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Lectrosonics WM overview

  • 1Description

The WM Watertight Wireless Microphone Transmitter by Lectrosonics is designed to operate in wet or dusty environments. The WM resists damage in harsh environments, but also offers a comprehensive feature set that makes it equally at home in film, television, and on stage.

The WM's input preamp is built of very high quality, low noise components with a wide gain range. The DSP-controlled input limiter has a range of more than 30 dB and a dual-release envelope, making it transparent while maintaining low distortion. Dual-color LEDs on the control panel accurately indicate audio input level for precise gain adjustment.

Lectrosonics patented Digital Hybrid technology revolutionizes wireless microphone transmission. Digital audio signal is converted and encoded for analog transmission, then decoded and converted back to digital audio at the receiver. The result is an exceptionally low noise floor with clear audio reception retained at greater distances. To meet the demand for both extended operating range and extended battery life, the WM transmitters offer selectable output power of 50, 100 or 250 mW.

The WM transmitter is made of solid, machined aluminum housing with a corrosion-resistant finish. The moisture-sealed control panel has a backlit LCD and enlarged membrane switches. The antenna is made of an extremely durable, multistrand alloy that will withstand heavy abuse. It is mounted with a compression sealed strain relief that prevents dust and moisture from entering the housing.

Includes M152/WP Omnidirectional Lavalier Mic
The WM transmitter includes an M152/WP Omnidirectional Lavalier Microphone with Watertight Connection. It features a wide frequency response that accentuates the presence and character of the human voice. The omnidirectional polar pattern provides a generous response at the direct and off-axis sections of the microphone capsule.
Variable, Selectable Output Power
The WM features selectable 50, 100, 250 mW output power.
Watertight Construction
For smooth operation in wet or dusty conditions, The WM transmitter features O-ring sealed battery compartments and input jack, a compression sealed antenna port and gasket sealed control panel and back cover.
Digital Hybrid Wireless Architecture
Lectrosonics incorporates digital and analog audio technology to enhance range and eliminate the noise associated with compandor circuits.
Backwards Compatibility
The WM transmitter is completely compatible with all current Lectrosonics Digital Hybrid receivers and older Lectrosonics analog receiver models as well.
Extended Battery Life
The WM transmitter is powered by two lithium AA batteries, for up to 14.5 hours of continuous use.
In the Box
Lectrosonics WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 20)
  • M152/WP - Omnidirectional Lavalier Microphone with Watertight Connection
  • 1-Year Limited Warranty
  • Table of Contents
    • 1Description

    Lectrosonics WM specs

    Operating Frequency 512.000 - 537.500 MHz
    Channel Spacing 100 kHz
    Frequency Selection Control panel mounted membrane switches
    RF Power Output Switchable; 50, 100 or 250 mW
    Compatibility Modes Digital Hybrid Wireless (400 Series), 200 Series, 100 Series, Mode 3, Mode 6, IFB
    Pilot Tone 25 to 32 kHz; 5 kHz deviation (in 400 Series Hybrid Mode)
    Frequency Stability ± 0.002%
    Deviation ± 75 kHz max. (in 400 Series Mode)
    Spurious Emission 60 dB below carrier
    Equivalent Input Noise -125 dBV, A-weighted
    Input Level
    • Dynamic mic: 0.5 mV to 50 mV before limiting; greater than 1 V with limiting
    • 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 5 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
    Limiter Soft limiter, 30 dB range
    Bias Voltage(s) Selectable; 2V, 4V and Off
    Gain Range 44 dB; panel mounted membrane switches
    Modulation Dual bicolor LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
    Controls Control panel with LCD and four membrane switches
    Low Frequency Roll-Off Adjustable from 35 to 150 Hz
    Audio Frequency Response 35 Hz to 20 kHz, +/-1 dB
    Signal to Noise Ratio SmartNR Off
    • no limiting: 103.5 dB
    • limiting: 108.0 dB

    SmartNR Normal
    • 107.0 dB
    • 111.5 dB

    SmartNR Full
    • 108.5 dB
    • 113.0 dB
    Total Harmonic Distortion 0.2% typical (400 Series mode)
    Audio Input Jack 2.5 mm locking micro; threaded for stainless sleeve on WP connector
    Antenna Flexible, unbreakable steel cable
    Batteries Two 1.5 Volt AA lithium
    Battery Life
    • 50 mW: 14.5 hrs
    • 100 mW: 14 hrs
    • 250 mW: 7.5 hrs
    Emission Standard 180KF3E
    Dimensions 2.98 x 2.55 x 0.77" (75.7 x 64.8 x 19.6 mm)
    Weight 5.33 oz (151 g) with lithium batteries
    Packaging Infofwftyscrcwxzc
    Package Weight 1.0 lb

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