Looking for Coupons?Call us 800-449-9128 Hablamos Español  
MF MD HG01 New & Handpicked Amps and Effects 07-17-17
Audio-Technica Logo
Product 276527

Audio-Technica ATW-3131a Lavalier Wireless System with AT831CW   

  • Write a Review

This combination of the ATW-R3100 receiver and ATW-T310 UniPak transmitter with AT831CW Lavalier microphone makes it easy to go wireless with interfe...Click To Read More About This Product

We're sorry-this item is unavailable.

Find a similar product below or contact our experts for a recommendation of great alternatives. Call us at 800-449-9128.

Customers Also Viewed:

Easy setup, great sound, and truly professional performance.

This combination of the ATW-R3100 receiver and ATW-T310 UniPak transmitter with AT831CW Lavalier microphone makes it easy to go wireless with interference-free operation. The compact size of the receiver allows two units to be mounted side-by-side in a single rack space for convenient expansion.

Consumer Alert:

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCCs wireless microphone website at: www.fcc.gov/cgb/wirelessmicrophones.

  • Automatic frequency scanning
  • 200 PLL-synthesized channels per band selectable via soft-touch controls on receiver and transmitter
  • True Diversity operation selects the better signal from two independent receiver sections, reducing dropouts
  • Interference-resistant UHF band operation
  • Advanced digital Tone Lock„¢ squelch
  • Red alert light that warns of low battery power, signal loss and input overload
  • Transmitter battery-life fuel gauge on the receiver
  • Ground-lift switch
  • Balanced and unbalanced audio output jacks
  • Two receivers can be mounted side-by-side in a single 19" rack space
  • ATW-T310 UniPak„¢ transmitter includes Super Hi-Z input that provides optimum load for guitar pickups

Order today and experience the freedom of high quality wireless.


ATW-3131a Lavalier Wireless System with AT831CW

  • Operating Frequencies: UHF band
  • Band C: 541.500 MHz to 566.375 MHz
  • Band D: 655.500 MHz to 680.375 MHz
  • Number of Channels: 200 total per band
  • Frequency Stability: ±0.005%, Phase Lock Loop frequency control
  • Modulation Mode: FM
  • Normal Deviation: ±10 kHz
  • Operating Range: 300' typical
  • Operating Temperature Range: 41 F (5 C) to 113 F (45 C)
  • Frequency Response: 70 Hz to 15 kHz
  • Receiver specifications
  • Receiving System: Dual independent receivers, automatic-switching diversity
  • Image Rejection: 60 dB nominal, 55 dB minimum
  • Signal-to-noise Ratio: 110 dB at 35 kHz deviation (IEC-weighted), maximum modulation 75 kHz
  • Sensitivity: 24 dBV (S/N 60 dB at 5 kHz deviation, IEC-weighted)
  • Intermediate Frequency: 243.950 MHz, 10.7 MHz
  • Audio Output: Unbalanced: 50 mV (at 1 kHz, ±5 kHz deviation, 10k ohm load)
  • Balanced: 32 mV (at 1 kHz, ±5 kHz deviation, 10k ohm load)
  • Output Connectors: Unbalanced: 1/4" TS ("mono") phone jack
  • Balanced: XLRM-type
  • Power Supply: 120V AC 60 Hz, or 12-18V DC, 500 mA, center positive, with external supply
  • Dimensions: 8.27" (210.0 mm) W x
  • 1.93" (49.0 mm) H x
  • 7.20" (183.0 mm) D
  • Weight: 2.4 lbs (1.1 kg)
  • Accessories Included: AC adapter; two flexible UHF antennas; rack-mount adapters
  • Body-pack transmitter specifications
  • RF Power Output High: 30 mW; Low: 10 mW, nominal
  • Spurious Emissions Under federal regulations
  • =110 dB, A-weighted
  • Input Connections High impedance, low impedance, bias
  • Antenna Tip Color Band C: Blue
  • Band D: Green
  • Batteries Two 1.5V AA alkaline (not included)
  • Current Consumption High: 200 mA; Low: 150 mA, typical
  • Battery Life Approximately 6 hours (High); 8 hours (Low), depending on battery type and use pattern
  • Dimensions 2.60" (66.0 mm) W x
  • 3.43" (87.0 mm) H x
  • 0.94" (24.0 mm) D
  • Net Weight 2.8 oz (80 grams)
  • Handheld transmitter specifications
  • RF Power Output: High: 30 mW; Low: 10 mW, nominal
  • Spurious Emissions: Under federal regulations
  • =108 dB, A-weighted
  • Microphone Element: ATW-T341 Dynamic cardioid (unidirectional)
  • ATW-T371 Condenser cardioid (unidirectional)
  • Batteries: Two 1.5V AA alkaline (not included)
  • Current Consumption: High: 230 mA; Low: 180 mA, typical
  • Battery Life: Approximately 6 hours (High); 8 hours (Low), depending on battery type and use pattern
  • Dimensions: ATW-T341: 9.33" (237.0 mm) long, 1.89" (48.0 mm) diameter
  • ATW-T371: 9.38" (238.3 mm) long, 2.11" (53.6 mm) diameter
  • Net Weight: ATW-T341: 9.9 oz (280 g)
  • ATW-T371: 8.0 oz (227 g)
  • (without batteries)
  • Accessory Included: AT8456a Quiet-Flex stand clamp

Review Snapshot

by PowerReviews

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

Displaying reviews 1-2

Back to top


ATW-3131a Great product

By aasounds


I recently purchased the ATW-3131a wireless microphone for our church, and has proved to be worth the money! The set-up was simple and quick, even though this unit has so many features. Super-good range allowing our pastor to roam wherever he needs! If you are looking for high quality worry free operation this is the wireless system to buy!


Mediocre- but good for small theatres

By Brandon-.WZY6

from Washington D.C.

My medium sized theatre has trouble with getting a perfect connection with these, for the price, i would expect them to work flawlessly. In fact, we are planning on returning one or two of the six. One is terribly frustrating, the other is a nuisance. They were beaten by our old tascams which are 10+ years old.

Displaying reviews 1-2

Back to top

See All Audio-Technica Lavalier Microphone Wireless Systems
You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.