Lectrosonics 2-Person SRc Wireless Omni Lavalier Microphone System Kit for Standalone Use (B1: 537 to 607 MHz)

Lectrosonics 2-Person SRc Wireless Omni Lavalier Microphone System Kit for Standalone Use (B1: 537 to 607 MHz)
Key Features
  • Professional Film & TV Applications
  • 2 x M152/5P Omni Lavalier Mics
  • 2 x SMWB Beltpack Transmitters
  • SRc Dual-Channel Slot-Mount Receiver
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The Lectrosonics 2-Person SRc Wireless Omni Lavalier Microphone System Kit for Standalone Use from B&H is designed to deliver pristine audio and reliable performance for professional filmmaking and TV applications, when used with an audio bag.
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Lectrosonics SRc Overview

  • 1Description
  • 2Lectrosonics SMWB Wideband Beltpack Transmitter/Recorder (B1: 537 to 607 MHz)
  • 3Lectrosonics M152/5P - Omnidirectional Lavalier Microphone
  • 4Lectrosonics SRc Dual-Channel Slot-Mount ENG Receiver (B1: 537.600 to 614.375 MHz)
  • 5Lectrosonics SREXT SR Receiver Mounting Kit for Stand Alone Operation

The Lectrosonics 2-Person SRc Wireless Omni Lavalier Microphone System Kit for Standalone Use from B&H is designed to deliver pristine audio and reliable performance for professional filmmaking and TV applications, when used with an audio bag.

The kit includes an SRc dual-channel slot-mount receiver and two SMWB beltpack transmitters, each with an M152/5P omnidirectional lavalier microphone. The bodypacks also function as portable recorders, great in situations when wireless reception is compromised. Also included is the SREXT adapter kit with two locking TA3-M balanced output connectors and a locking power jack connector.

Please note: 608.000 to 614.000 MHz are excluded

Lectrosonics SMWB Wideband Beltpack Transmitter/Recorder (B1: 537 to 607 MHz)

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 B1 range (537 to 607 MHz), 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.

Please note: 608.000 to 614.000 MHz are excluded

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

Lectrosonics M152/5P - Omnidirectional Lavalier Microphone

The Lectrosonics M152/5P Omnidirectional Lavalier Microphone is highly sensitive, and features a wide frequency response that accentuates the presence and character of the human voice. The M150's frequency response is measured at 20Hz to 20kHz with a slight rise around 10kHz, resulting in a brighter, more "airy" response. A low frequency dip around 50Hz reduces noise caused by proximity effect and ambience. The omni-directional polar pattern provides a generous response at the direct and off-axis sections of the microphone capsule. The M152/5P is compatible with any Lectrosonics beltpack with a TA5 connector.

Omnidirectional Polar Pattern

The omnidirectional polar pattern provides a generous pickup at the direct and indirect sections of the capsule. The omnidirectional pattern is less susceptible to handling and clothing noise.

Wide Frequency Response

The wide 20Hz to 20kHz frequency response features a slight rise around 10kHz. The high frequency rise enhances high frequencies of vocals, creating an "airy" response.

Compatibility with Lectrosonics Transmitters

The mic is compatible with any other Lectrosonics beltpacks with TA5 connectord

Lectrosonics SRc Dual-Channel Slot-Mount ENG Receiver (B1: 537.600 to 614.375 MHz)

The SRc Dual-Channel Slot-Mount ENG Receiver from Lectrosonics consist of two separate receivers built into a single, ultra-compact housing with adapters for video-camera-receiver slots and for stand-alone use. They can be used when paired with a transmitter & microphone (sold separately) in various environments for ENG (Electronic News Gathering), EFP (Electronic Field Productions) and other audio applications.

Each receiver features Digital Hybrid Wireless technology that provides compandor-free audio quality and compatibility with other wireless systems. The RF performance is stable over a wide temperature range, making the receiver perfectly suited in rough environmental conditions.

The front panel has a menu-driven LCD interface and four membrane switches which are used to view and alter settings. In addition, the LCD window displays the pilot-tone indicator, diversity activity, RF level, audio level, and transmitter battery status for both receivers.

Furthermore, a built-in spectrum analyzer scans across the tuning range of the receiver and displays a histogram of RF activity across the band. Areas of RF activity are easily recognizable. The two internal receivers can be operated separately and both have switching, antenna-combining diversity, or in tandem with ratio-diversity reception.

Finally, a variety of output adapters and mounting options are available for camera-slot operation. The receivers are powered from an external 7 to 18 VDC source.

Fits camera "slots," Lectrosonics Duopack adapter and Octopack multicoupler, and operates stand-alone with various adapters
Dual-receiver design for two channels with phase switched diversity or single channel with ratio diversity operation
Digital Hybrid Wireless with compatibility modes for use with other transmitters
Tracking front-end filters for high performance in tough RF environments
LCD with RF spectrum scanning
SmartSquelch DSP-controlled, noise-based filtering and squelch
DSP-based pilot tone for squelch control
IR sync port for quick transmitter setup (LMb, LT, HHa, HMa, & SSM)
SmartTune operation for quick and confident frequency selection

Lectrosonics SREXT SR Receiver Mounting Kit for Stand Alone Operation

The Lectrosonics SREXT is a connector panel adapter kit for the Lectrosonics SR Dual Slot-In Receiver. The kit is intended to provide the freedom of using the SR Receiver on standard, non slot-in mount scenarios. On the included connector panel are two TA3-male jacks for balanced output and a power jack with a locking connector. An unterminated power cable may trimmed to a desired length.

Lectrosonics SMWB Wideband Beltpack Transmitter/Recorder (B1: 537 to 607 MHz) Specs

Operating FrequenciesB1: 537 to 607 MHz
Channel SpacingSelectable between 25 or 100 kHz
RF Power OutputSwitchable among 25, 50 and 100 mW
Compatibility ModesDigital Hybrid Wireless (NU Hbr), 200 Series, 100 Series, Mode 3, Mode 6, IFB
Pilot Tone25 to 32 kHz; 5 kHz deviation (digital hybrid mode)
Frequency Stability± 0.002%
Deviation± 75 kHz maximum (digital hybrid mode)
Spurious RadiationCompliant with ETSI EN 300 422-1
Equivalent Input Noise-125 dBV, A-weighted
Input LevelIf set for dynamic mic: 0.5 to 50 mV before limiting, greater than 1 V with limiting
If set for a lavalier mic: 1.7 to 170 uA before limiting; greater than 5000 uA (5 mA) with limiting
If set for line-level input: 17 mV to 1.7 V before limiting; greater than 50 V with limiting
Input ImpedanceDynamic mic: 300 Ohms
Lavalier: Input is virtual ground with servo adjusted constant current bias
Line level: 2.7 kOhms
Input LevelSoft limiter, 30 dB range
Bias VoltageFixed 5 V at up to 5 mA; selectable servo bias for any electret lavalier (2 or 4 V)
Gain Control Range44 dB; panel mounted membrane switches
Modulation IndicatorsDual bicolor LEDs indicate modulation; -20, -10, 0, +10 dB referenced to full modulation
ControlsControl panel with LCD and 4 membrane switches
Low Frequency Roll-OffAdjustable from 35 to 150 Hz
Audio Frequency Response35 Hz to 20 kHz, ±1 dB
Signal to Noise RatioOff: 103.5 dB (no limiting); 108.0 dB (with limiting)
Normal: 107.0 dB (no limiting); 111.5 dB (with limiting)
Full: 108.5 dB (no limiting); 113.0 dB (with limiting)
THD0.2% typical (400 Series mode)
Audio Input JackSwitchcraft 5-pin locking (TA5F)
Storage MediamicroSDHC memory card
File Format.WAV files (BWF)
A/D Converter24-bit
Sampling Rate44.1 kHz
Recording ModesHD mono mode
24-bit: 144 kbps 32-bit: 192 kbps

Split gain mode
24-bit: 288 kbps
32-bit: 384 kbps
InputAnalog mic/line level compatible; servo bias preamp for lavalier microphones (2 and 4 V)
Input LevelDynamic mic: 0.5 to 50 mV
Electret mic: Nominal, 2 to 300 mV
Line level: 17 mV to 1.7 V
Input ConnectorTA5M 5-pin male
Audio PerformanceFrequency response: 20 Hz to 20 kHz; +0.5/-1.5 dB
Dynamic range: 110 dB (A-weighted), before limiting
Distortion: < 0.035%
Operating Temperature Range-5 to 122°F / -20 to 50°C
AntennaFlexible, unbreakable steel cable
BatteryAA lithium, disposable
Battery Life (approx.)50 mW (1 x AA): 7.3 hours
100 mW (1 x AA): 5.5 hours
Dimensions2.3 x 1.8 x 0.6" / 58 x 46 x 16 mm (without microphone)
Weight2.7 oz / 75.9 g (with batteries)
Packaging Info
Package Weight0.94 lb
Box Dimensions (LxWxH)9.85 x 7.9 x 2.95"

Lectrosonics M152/5P - Omnidirectional Lavalier Microphone Specs

TransducerElectret Condenser
Polar PatternOmnidirectional
Frequency Response20Hz - 20kHz
Dynamic Range (Typical)Not Specified by Manufacturer
Signal-to-Noise RatioMore than 38dB
Maximum Input Sound Level138dB, (@ 1kHz, 0.5% THD)
Power RequirementsMax Operating Voltage: 10V supplied by transmitter
Output Impedance3k (2-6k)
Output ConnectorsTA5-female for UM Series Transmitters
Low Frequency Roll-OffNo
DimensionsNot Specified by Manufacturer
WeightNot Specified by Manufacturer
Packaging Info
Package Weight0.13 lb
Box Dimensions (LxWxH)3.9 x 2.5 x 1.2"

Lectrosonics SRc Dual-Channel Slot-Mount ENG Receiver (B1: 537.600 to 614.375 MHz) Specs

Operating FrequenciesB1: 537.600 to 614.375 MHz
Frequency Selection StepsSelectable; 100 or 25 kHz
Type of ReceiverDual conversion, superheterodyne
IF FrequencyCh.1: 248.450 MHz and 350.000 kHz
Ch.2: 243.950 MHz and 250.000 kHz
Frequency Stability±0.001 %
Front End Bandwidth20 MHz @ -3 dB
Sensitivity20 dB SINAD: 1.0 uV (-107 dBm), A weighted
60 dB Quieting: 2.2 uV (-100 dBm), A weighted
Squelch QuietingGreater than 100 dB typical
AM RejectionGreater than 60 dB, 4 uV to 1 V
Modulation Acceptance85 kHz
Image and Spurious Rejection85 dB
Third Order Intercept0 dBm
Diversity MethodSmartDiversity phased antenna combining or Ratio Diversity using both receivers for a single audio channel
FM DetectorDigital Pulse Counting Detector operating at 250 and 350 kHz
RF Spectrum AnalyzerCoarse and fine scanning modes for RF spectrum site survey
Antenna Inputs50 Ohms SMA female connectors
Audio Output ConnectorsInterchangeable D connector adapters for camera slot interfaces
Dual TA3 male (mini XLR) balanced output adapter
Balanced output adapter with fixed cables
Front-panel TA5M with two balanced outputs (5P version)
Audio Output LevelAdjustable -50 to +5 dBu in 1 dB steps; unbalanced output is 6 dB lower
Audio Channel Crosstalk-80 dB or better
Front Panel Controls and IndicatorsSealed panel with membrane switches
LCD monitors pilot tone; antenna phase, receiver battery level; transmitter battery status; audio level, RF level
Audio Test Tone1 kHz, -50 dBu to +5 dBu output (bal); 1% THD
Transmitter Battery Type Selection9 V alkaline, 9 V lithium, AA alkaline, AA lithium, NiMH
Phase InvertAudio-output phase normal or inverted
Compatibility ModesHYB native Digital Hybrid mode
M.3 non-Lectrosonics (call factory)
200 Lectrosonics 200 Series
100 Lectrosonics 100 Series
HYB/TB Digital Hybrid w/ Talkback
M.7 non-Lectrosonics (call factory)
M.6 non-Lectrosonics (call factory)
IFB Lectrosonics IFB
SmartNR (Noise Reduction)Off, Norman, Full modes (available in Digital Hybrid mode only)
Audio Performance (Overall System)
Frequency Response32 Hz to 20 kHz (+/- 1 dB)
THD0.15% (system) typical in Digital Hybrid mode
Input Dynamic Range125 dB (with full Tx limiting)
Rear Panel ControlsAudio-output connectors
External DC input
Powering and Current ConsumptionMin. 7 V to max. 18 VDC; 2.2 W
125 mA at 18 VDC
180 mA at 12 VDC
295 mA at 7 VDC
Runtime with SRBATTSLED Adapter7.2 V, 2200 mAh "L" style battery will typically provide about 11 hours of operation
Transmitter BatteryLevel Tracking: LCD display with battery icon or timer readout
Operating Temperature-4 to 122°F / -20 to +50°C
Dimensions (W x H x D)2.92 x 1.22 x 4.93" / 74 x 31 x 125 mm
Weight7.9 oz / 225 g with SREXT adapter
Packaging Info
Package Weight0.94 lb
Box Dimensions (LxWxH)9.9 x 7.95 x 2.9"

Lectrosonics SREXT SR Receiver Mounting Kit for Stand Alone Operation Specs

Packaging Info
Package Weight0.25 lb
Box Dimensions (LxWxH)2.6 x 1 x 0.65"
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