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Audio-Technica ATW-3211/831- 3000 Series Wireless Cardioid Lavalier Microphone System (Band EE1: 530 to 590 MHz)

Brand: Audio Technica

Original price was: $999.00.Current price is: $649.00.

ATW-3211/831EE1 – 3000 Series (Fourth Generation) Frequency-agile True Diversity UHF Wireless Body-Pack System with AT831 cardioid lapel microphone

Key Features
  • For Presenters and Performers
  • AT831cH Cardioid Lavalier Mic
  • Rugged Bodypack Transmitter
  • True-Diversity Rackmount Receiver
  • 2400 Auto-Scan Frequencies
  • Selectable 10/30mW RF Power
  • Dual-Mode OLED Display
  • 9.5-Hour NiMH Batteries
  • Expandable to 40 Mic Channels/330′ Range

The Audio-Technica ATW-3211/831 is a 3000 Series (4th generation) rackmount wireless lavalier microphone system with professional-level features for enhanced reliability and control. It offers an intuitive interface with a dual-mode OLED display for easy operation. With a wide 60 MHz tuning range and true-diversity reception, the system minimizes potential dropouts to deliver intelligible, natural audio for presenters, clergy, lecturers, and performers working in business and educational settings, houses of worship, theaters, or on musical stages.

The ATW-3211/831 includes a half-rack receiver housed in a rugged, full-metal chassis with removable antennas, well suited for rackmounting in portable flight cases or permanent installations. The receiver’s auto-scan function searches 2400 selectable frequencies, seeking out a clean, interference-free channel for your audio transmission. The 3000 Series lets you set a clean backup frequency in advance, which you can quickly switch to with a press on the transmitter’s multifunction button in the event of unexpected interference.

This system features an AT831-cH cardioid lavalier mic that provides crisp, full-sounding voice pickup, while also excelling as an instrument mic. The bodypack transmitter is equipped with a rugged metal housing and a proprietary Hirose 4-pin cH-style screw-down connector for secure connection. The transmitter provides up to 9.5 hours of operation on two AA NiMH rechargeable batteries (available separately), with a selectable 10/30mW RF power output for overcoming interference in difficult RF environments. The transmission range is up to 330′. Up to 40 mic channels can operate simultaneously in each frequency band.

Compact Bodypack with Cardioid Lavalier for Hands-Free Presentations
  • The AT831cH lavalier features a cardioid pattern for significant rejection of unwanted background sound and reduced feedback on stage.
  • The bodypack transmitter features a rugged Hirose 4-pin cH-style connector, which provides secure connection to compatible lavalier mics, headworn mics, and cables.
  • The transmitter’s input accepts low-impedance microphone levels as well as high-impedance musical instrument or line levels. The gain ranges from -10 to +20 dB and can be adjusted in 2 dB increments.
  • The bright OLED screen presents comprehensive setup and operating information, including battery indicator, mute status, and operating frequency. Setup functions are menu-driven via soft-touch controls, which are covered to prevent accidental changes.
  • A tactile mute toggle switch (defeatable) provides physical confirmation of mute status when transmitter display is not visible.
  • The transmitter easily syncs to the receiver via infrared with a quick press on the Sync button.
  • Two RF power output settings are available: the low-level setting extends battery life while the high-level offers a stronger RF signal link.
  • In case of interference, the programmable multifunction button on the transmitter can be used to switch to a clean, backup frequency with minimal interruption.
  • The transmitter operates for up to 9 hours on two AA alkaline batteries and up to 9.5 hours on two rechargeable AA NiMH batteries.
  • Charging terminals on the base of the transmitter work with the optional ATW-CHG3 charging dock or ATW-CHG3N networked charging dock to recharge AA NiMH batteries.
  • The durable metal chassis is equipped with a field-replaceable whip antenna and a secure, locking battery compartment door.
Reliable Receiver That’s Easy to Use
  • The wide 60 MHz UHF bandwidth gives you 2400 selectable frequencies to choose from for interference-free audio transmission in an increasingly congested RF environment.
  • To prevent dropouts, the receiver’s true-diversity reception compares incoming signals on two independent receiver circuits to ensure optimal RF quality.
  • Auto-frequency scanning automatically selects the most appropriate frequency for the area in which the wireless is operating.
  • Pre-coordinated frequency scan groups are available to simplify selection of usable frequencies in a multichannel wireless setup.
  • The bright, dual-mode OLED display can be switched between two modes: the standard view provides continuous indication of RF signal strength, frequency, mute status, audio modulation level, and transmitter information, while the performance view highlights key metering.
  • The display also shows the transmitter’s battery life and mute status.
  • Settings can be quickly adjusted using the control dial and BACK button located on the receiver’s front panel. Settings can also be locked to prevent accidental changes.
  • The BNC sockets for the two detachable antennas provide bias power to active remote antennas and other in-line RF devices.
  • The ground-lift switch on the back panel helps eliminate audible hum caused by ground loops.
  • One balanced XLR and one unbalanced 1/4″ audio outputs let you connect the receiver to a mixing board or PA system.
  • The half-rack receiver chassis can be mounted alone in a standard 19″ rack using the included mounting brackets and screws.
Enhance the Performance of Your System
  • Adding a pair of ATW-A49 LPDA directional remote antennas increases the range of your system and offers more protection against interference.
  • The optional RF Venue DISTRO4 four-channel antenna distribution system allows you to distribute the RF signal from the remote antennas to four discrete 3000 Series receivers.
Add Functionality to Your System
Audio-Technica offers a variety of lavalier, headset, and handheld microphone options to adapt your 3000 Series system as your needs evolve.


  • The comfortable BP892xcH earset mic and the discreet BP893xcH miniature MicroEarset mic provide exceptional clarity in spoken word applications.


  • The ATW-T3202 handheld transmitter/mic is available with a variety of mic capsules for presenters and performers who prefer the flexibility of a handheld microphone.


  • The AT-GcH guitar cable lets you connect the bodypack transmitter to a guitar or bass.

Audio-Technica ATW-3211/831EE1 Specs

Wireless Technology Analog UHF
Number of RF Channel Frequencies 2400
Included Transmitters 1 x Bodypack
Diversity True Diversity
RF Frequency Band EE1:
430 to 589.975 MHz
RF Bandwidth 60 MHz
Frequency Step Size 25 kHz
Max Operating Range 328.1′ / 100 m
Max Transmitters per Band 40
Dynamic Range 115 dB (Mic Input)
112 dB (Instrument Input)
Encryption None
Deviation ±38 kHz
Modulation FM
Receiver Type Tabletop
Mounting Options Rackmount (with Included Hardware)
Rackmount Size 1 RU (1/2 Rack)
Antenna 2 x External, BNC (Rear-Mount)
Antenna Bias Voltage 12 VDC, 160 mA (Combined)
Number of Audio Channels 1
Audio I/O 1 x XLR 3-Pin Male Balanced Output
1 x 1/4″ TRS Female Unbalanced Output
Gain Range -60 to 0 dB (2 dB Steps)
Audio Output Level XLR Output:
+14 dBV
1/4″ Output:
+8 dBV
Frequency Response 31 Hz to 15.5 kHz (Dependent on Mic)
Power Requirements AC/DC Power Adapter
AC/DC Power Adapter 12 VDC at 1 A, Center-Positive (Included)
AC Input Power 100 to 240 VAC, 50 / 60 Hz
Display & Indicators 1 x Backlit OLED (AF Level, Channel, Frequency, Mute, RF Level, Transmitter Battery Status)
Dimensions 8.3 x 1.7 x 7.5″ / 210 x 43.4 x 191 mm
Weight 38.8 oz / 1100 g
Transmitter Type Bodypack
RF Output Power 10 / 30 mW (Switchable, at 50 Ohms)
Audio I/O 1 x Hirose cH-Style 4-Pin Male Input (Lockable)
Muting Mute Switch
Gain Range -10 to +20 dB (2 dB Steps)
Signal Processing High-Pass Filter:
125 Hz, 12 dB/Octave Slope
Sync Method IR
Antenna 1 x Flexible Whip, Detachable (Beltpack)
Power Requirements Battery
Battery Type 2 x AA (Not Included)
Approx. Battery Life Low:
9 Hours (Alkaline)
9.5 Hours (NiMH Rechargeable)
8 Hours (Alkaline)
9 Hours (NiMH Rechargeable)
Display & Indicators 1 x Backlit OLED (Battery Status, High-Pass Filter, Mute, RF Output Power)
Housing Metal
Dimensions 2.5 x 0.9 x 3.2″ / 64 x 23 x 82 mm
Weight 3.6 oz / 102 g (without Batteries)
Microphone Type Lavalier
Color Black
Sound Field Mono
Capsule Electret Condenser
Polar Pattern Cardioid
Frequency Range 40 Hz to 16 kHz
SNR 65 dB
Maximum SPL 141 dB SPL
Dynamic Range 112 dB
Output Connectors 1 x Hirose cH-Style 4-Pin Female (Lockable)
Cable Length 4.59′ / 1.4 m
Operating Voltage 1.5 to 8 V
Operating Current Consumption 0.15 mA
Length 0.98″ / 25 mm
Diameter 0.40″ / 10.2 mm
Weight 0.1 oz / 2.8 g
Packaging Info
Package Weight 5.4 lb
Box Dimensions (LxWxH) 15.5 x 13.6 x 3.5″
Weight 6.5 lbs


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