Lectrosonics UCR411a Wireless Lavalier Microphone System Kit with No Mic (Block 20: 512 to 537 MHz)

BH #LEUCR411A20K (B&H Kit)
Lectrosonics UCR411a Wireless Lavalier Microphone System Kit with No Mic (Block 20: 512 to 537 MHz)
Key Features
  • For Professional Field Productions
  • For Mic with Lectrosonics TA5 Connection
  • SMV Super-Miniature Wireless Transmitter
  • UCR411a SmartDiversity Wireless Receiver
The Lectrosonics UCR411a Wireless Lavalier Microphone System Kit with No Mic from B&H delivers Lectrosonics's world-renowned, pristine wireless audio and reliability for professional field & location production.
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Lectrosonics UCR411a Overview

The Lectrosonics UCR411a Wireless Lavalier Microphone System Kit with No Mic from B&H delivers Lectrosonics's world-renowned, pristine wireless audio and reliability for professional field & location production.

The kit comes with the SMV super-miniature bodypack transmitter and the UCR411a SmartDiversity wireless receiver. The transmitter features a water-resistant, super-hard finish and includes a mic-connector kit with a weather-resistant sleeve.

For system compatibility, the component's frequency must match your existing system/component frequency.

Lectrosonics UCR411a Digital Hybrid Wireless Compact Receiver (Block 20: 512 to 537 MHz)

The UCR411a Digital Hybrid Wireless Compact Receiver from Lectrosonics is a portable, camera mountable receiver designed for professional outdoor or indoor audio applications. It can be used when paired with a transmitter and microphone to capture audio for ENG (electronic news gathering), and EFP (electronic field production) functions, and more.

All settings are made from the front panel with an LCD interface, making the unit ideal for use in Quad Paks, on sound carts, in portable bags, and in rackmount multi-couplers. The receiver is compatible with all 400 series wireless transmitters and provides 256 selectable UHF frequencies across a 25.6 MHz tuning range. SmartDiversity reception reduces RF interference and dropout and a built-in RF spectrum analyzer searches across the entire 25.6 MHz tuning range, locating the strongest possible frequencies in the area.

Furthermore, a balanced XLR output provides maximum output gain with minimal noise and the receiver is powered by two internal 9V batteries or external DC power supply. The machined aluminum housing and panels are surfaced with electrostatic powder-coated and anodized finishes with laser etched markings to withstand the rigors of field production.

For system compatibility, the component's frequency must match your existing system/component frequency.

Digital Hybrid Technology

24-bit digital audio stream is decoded at the receiver resulting in greater operating range without noise and artifacts caused by analog compandor circuits.

256 Selectable Frequencies

The receiver offers 256 selectable UHF frequencies over a 25.6 MHz range.

SmartDiversity Diversity Reception

The UCR411 uses Lectrosonic's SmartDiversity design analyzes incoming audio signal to determine the optimum timing for phase switching. The result is minimal noise and dropout due to RF interference.


Lectrosonics SmartNR (Noise Reduction) automatically allocates noise reduction by attenuating audio signal that match a calculated, statistical profile. The result enhances clarity and intelligibility while eliminating noise.

Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 20)

The Lectrosonics SMV Super Miniature Wireless Microphone Transmitter incorporates Lectrosonics patented Digital Hybrid Wireless technology, in a package no bigger than a pager. The SMV transmitter is miniature in size yet rugged enough to withstand rigorous daily use in the field or in studios.

To meet the demand for both extended operating range and extended battery life, the SMV transmitters offer selectable output power of 50, 100 or 250 mW. A third selection at 50 mW is provided for some theatrical applications, where the system design specifies lower transmitter power. The SMV transmitter offers 256 user-selectable UHF frequencies. The Switchcraft TA5M audio input has user-calibrated 44 dB gain range, and accepts electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more than 30 dB and a dual-release envelope, making the limiter transparent while maintaining low distortion.

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 as the compandor circuit is eliminated and clear audio reception is retained at greater distances.

The non-corrosive, machined aluminum casing is splash proof and features an LCD display with membrane switch control panel. The transmitter is powered by one AA lithium, NiMH or alkaline battery for up to 7.25 hours (lithium). The SMV transmitter is completely compatible with all Lectrosonics Digital Hybrid wireless receivers, as well as older Lectrosonics analog receivers.

Variable, Selectable Output Power

The SMV features selectable 50, 100 or 250 mW output power.

Miniature Design

The miniature design allows for a variety of mounting possibilities in film, video, theater, performances, etc.

Digital Hybrid Wireless Architecture

Lectrosonics incorporates digital and analog audio technology to enhance range and eliminate the noise associated with compandor circuits.

Locking TA5-Male Connection

A locking TA5M input is compatible with Lectrosonics and third-party microphones and cables. The input accepts line and microphone level signal.

Backwards Compatibility

The SMV transmitter is completely compatible with all current Lectrosonics Digital Hybrid receivers and older Lectrosonics analog receiver models as well.

Splash-Proof Enclosure

The polished aluminum enclosure is moisture proof and ideal for use in rain.

Extended Battery Life

The SMV transmitter is powered by one AA alkaline, NiMH or lithium rechargeable battery. With Lithium power, the unit is capable of up to 7.25 hours of use.

Lectrosonics UCR411a Digital Hybrid Wireless Compact Receiver (Block 20: 512 to 537 MHz) Specs

RF Carrier Frequency RangeBlock 20: 512 to 537 MHz
Frequency Adjustment Range25.5 MHz in 100 kHz steps
Type of ReceiverTriple conversion, superheterodyne, 244 MHz, 10.7 MHz, and 300 kHz
Frequency Stability±0.001%
Front End Bandwidth±5.5 MHz @ -3 dB
Sensitivity20 dB Sinad: 0.9 uV (-108 dBm), A weighted
60 dB Quieting: 1.12 uV (-105 dBm), A weighted
Squelch QuietingGreater than 100 dB
AM RejectionGreater than 60 dB, 2 uV to 1 V (undetectable after processing)
Modulation Acceptance85 kHz
Image and Spurious Rejection85 dB
Third Order Intercept+8 dBm
Diversity MethodPhased antenna combining SmartDiversity
FM DetectorDigital Pulse Counting Detector operating at 300 kHz
Antenna InputsDual BNC female, 50-Ohm impedance
Audio OutputsRear Panel XLR: Adjustable from -50 dBu to +5 dBu in 1 dB steps
Calibrated into a typical 10-kOhm balanced load
Can drive 600-Ohm load
Front Controls & Indicators
LCD DisplayMain Window: Pilot tone, antenna phase, receiver battery level, transmitter battery status, audio level, and RF level
Frequency Window: Frequency, TV channel, and Transmitter switch setting
Audio Output Level Adjustment: -50 dBu to +5 dBu
Battery Level Tracking: Receiver and transmitter (9 V battery) in 1/10th V steps, accuracy ±0.2 V
Transmitter (AA battery) x.xxV format, accuracy ±0.05 V
Timer option available when transmitter battery is set to NiMH
Scanning Mode: Coarse and fine modes for RF spectrum site scanning
Audio Test Tone: 1 kHz, -50 dBu to +5 dBu output, < 1% THD
Transmitter Battery Type Selection: 9 V alkaline, 9 V lithium, AA alkaline, AA lithium, and NiMH
Phase Invert: Audio output phase normal or inverted
SmartNR (Noise Reduction): OFF, normal, and full modes (available in 400 Series mode only)
Audio Performance (Overall System)
Frequency Response32 Hz to 20 kHz (±1 dB)
THD0.2% (typical)
SNR at Receiver OutputSmartNR Off: No limiting 103.5 dB, w/limiting 108.5 dB
Normal: No limiting 107.0, w/limiting 111.5 dB
Full: No limiting 108.5, w/limiting 113.0 dB
Input Dynamic Range125 dB (with full Tx limiting)
Rear PanelXLR audio output jack, External DC input, and battery compartment access
Power OptionsExt DC: Minimum 10 V to maximum 18 VDC, 1.6 W, 180 mA at 12 VDC
Internal Battery: 2 x 9 V alkaline or lithium (165 mA @ 9 V, 240 mA @ 6 V)
Battery Life9 V Alkaline: 6 to 8 hours continuous, up to 12 hours intermittent
9 V Lithium: Up to 20 hours (continuous and intermittent usage are the same)
Dimensions3.2 x 1.3 x 4.6" / 8.2 x 3.2 x 11.8 cm
Weight14.0 oz / 396.9 g (with batteries)
Packaging Info
Package Weight3.3 lb
Box Dimensions (LxWxH)13.9 x 10.6 x 4.2"

Lectrosonics SMV Super Miniature Wireless Microphone Transmitter (Freq Block 20) Specs

Operating Frequency512.000 - 537.500 MHz
Frequency Range256 frequencies in 100 kHz steps for one 25.5 MHz wide block
Channel Spacing100 kHz
Frequency SelectionControl panel mounted membrane switches
RF Power OutputSwitchable; 50, 100 or 250 mW
Compatibility ModesDigital Hybrid Wireless® (400 Series), 200 Series, 100 Series, Mode 3 , Mode 6, IFB
Pilot Tone25 to 32 kHz; 5 kHz deviation (in 400 Series Mode)
Frequency Stability± 0.002%
Deviation± 75 kHz max. (in 400 Series Mode)
Spurious Emission60 dB below carrier
Equivalent Input Noise-125 dBV, A-weighted
Input Level
  • If set for dynamic mic: 0.5 mV to 50 mV before limiting; greater than 1 V with limiting
  • If set for 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 50 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
LimiterDSP Controlled Soft limiter, 30 dB range
Bias Voltage(s)Fixed 5 V at up to 5 mA; selectable 2 V or 4 V servo bias for any electret lavaliere
Gain Range44 dB; panel mounted membrane switches
ModulationDual bicolor LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
ControlsControl panel with LCD and four membrane switches
Low Frequency Roll-OffAdjustable from 35 to 150 Hz
Audio Frequency Response35 Hz to 20 kHz, +/-1 dB
Signal to Noise RatioSmartNR Off:
  • No Limiting: 103.5 dB
  • Limiting: 108 dB
SmartNR Normal:
  • No Limiting: 107 dB
  • Limiting: 111.5 dB
SmartNR Full:
  • 108.5 dB
  • 113 dB
Total Harmonic Distortion0.2% typical (400 Series mode)
Audio Input JackSwitchcraft 5-pin locking (TA5F)
AntennaFlexible, unbreakable steel cable
BatteriesOne 1.5 Volt AA lithium or rechargeable; NiMH recommended
Battery Life50 mW:
  • Alkaline: 2 hrs
  • Lithium: 7.25 hrs
  • 2500 MA NiMH: 5 hrs
100 mW
  • Alkaline: 1.5 hrs
  • Lithium: 5.5 hrs
  • 2500 MA NiMH: 4 hrs
250 mW
  • Alkaline: not recommended
  • Lithium: 3 hrs
  • 2500 MA NiMH: 2.25 hrs
Emission Standard180KF3E
Dimensions2.3 x 1.8 x 0.64" / 58 x 46 x 16 mm not including microphone/lanyard
Weight2.7 oz / 75.9 g with lithium battery
Packaging Info
Package Weight1 lb
Box Dimensions (LxWxH)10 x 7.5 x 3"
See any errors on this page? Let us know



is this compatible with the Lectrosonics HM Digital UHF Wireless Plug-On Microphone Transmitter (Freq Block 22), and Lectrosonics SMQV Super Miniature Wireless Microphone Transmitter (Freq Block 22)?
Asked by: Ben C.
Answered by: marc m.
Date published: 2018-08-27
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