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Audio Technica ATW-3131b True Diversity Lavalier Wireless System

Audio-Technica’s third-generation 3000 Series wireless systems offer selectable UHF frequencies and new features for clear sound & intuitive operation.


(14 reviews)


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Discounted Price $549.00
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Discounted Price $549.00
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Audio Technica offers simplified selection of usable frequencies, increased system reliability, and illuminated transmitter screens for clear reads on dark stages. It all adds up to the luxury of rock-solid, richly detailed high-fidelity sound.

The versatile ATW-T310b UniPak body-pack transmitter features a secure 4-pin locking connector compatible with a wide range of microphones, as well as a guitar cable. A 3-position sliding cover on the transmitter’s control panel prevents accidental shut-off or channel-switching. A new locking battery compartment provides a more secure latch and more robust design.

The Audio Technica 3000 series features rugged metal construction and slim ergonomic design.

  • Minimum Frequency: Step 25 kHz
  • Modulation Mode: FM
  • Maximum Deviation: ±35 kHz
  • Dynamic Range: > 110 dB (A-weighted), typical
  • Total Harmonic Distortion: < 1% (at 1 kHz, ±17.5 kHz deviation)
  • Operating Range 100 m (300'), typical
  • Open range environment with no interfering signals.
  • Operating Temperature Range: -5º C to +45º C (23º F to 113º F)
  • Frequency Response 70 Hz to 15 kHz (+1 dB, -3 dB)

  • Receiving System: True diversity
  • Image Rejection: 60 dB nominal, 55 dB minimum
  • RF Sensitivity:  20 dBuV at 60 dB S/N ratio
  • Maximum Output Level: XLR, balanced: +9 dBV; ¼" (6.3 mm), unbalanced: +7 dBV
  • Antenna Input: BNC-type, 50 ohms
  • Bias voltage: 12V DC, 60 mA, each
  • Power Requirements: 12-18V DC, 500 mA
  • Dimensions 210.0 mm 8.27"W x 6.47"D x 1.73" H  (not including BNC connectors or feet)
  • Net Weight: 1.1 kg (38.8 oz), without accessories
  • Accessories Included: Two flexible UHF antennas; AC adapter; rack-mount adapters

  • RF Power Output High: 30 mW, Low: 10 mW (switchable), at 50 ohms
  • Spurious Emissions Following federal and national regulations
  • Input Connection Four-pin Locking Connector
  • Pin 1: GND
  • Pin 2: INST INPUT
  • Pin 3: MIC INPUT
  • Pin 4: DC BIAS +5V
  • Batteries Two 1.5V AA, not included
  • Battery Life High: 6 hours (alkaline)
  • Low: 8 hours (alkaline)
  • Depending on battery type and use pattern.
  • Dimensions 66.0 mm (2.60") W x24.0 mm (0.94") D x 87.0 mm (3.43") H
  • Net Weight 81 g (2.9 oz), without batteries

While our site does not specify wireless products by channel or frequency range, we do stock different ones. If you require a specific channel, please call us at 800-472-6274 and we will help you get the exact wireless product you are looking for.

Get your Audio Technica ATW-3131b today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Things You Will Get:

    Lav Transmitter
    Two flexible UHF antennas
    AC adapter
    Rack-mount adapters
    Owner's Manual

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I've used the 3000 series for several years in a prolific music theatre. These are good packs for their price, and the handhelds are okay when they are handled with care. With the D band becoming unavailable we were planning on purchasing more of these models in the I and C bands. I am disappointed with Audio Technica for continuing to post this item with it's price when it is clearly no longer being manufactured for purchase. We are also upset that the only reasonable alternative, the 4th generation, has an different cable connector. If we went with the 4th generation we would have to purchase an entire set of new lavs plus spares. Which means it is just about as cost effective to switch to a higher quality brand rather then deal with these new problems. Over this period of time the packs and receivers did admirably in a stressful environment. The most common faults have been batteries falling out, and the occasional antenna snapped off by improper actor handling. I would purchase again if made available.

Sound Girl

Milwaukee, WI

This product help me a lot.


I use these mics in the house of worship


Burnsville, Mn


I have used many of these and they have always worked well.


These units sound great, I have used as many as 16 with 16 other brands at the same time with no problems, better to scan the system every time you use them no matter where you are, as there will be surprises, other wirelesses you did not know about and TV stations. The hand held condenser sounds as good as any mike I have used, high pass filter is a handy feature, mid high boost is handy too. Mute/Power loc comes in handy for fidgety actors, speakers and kids. double lock battery compartment is a pain, but works. You must train people how to use the hi-rose connectors properly on the belt packs or tell em to keep their hands off. You must take the time to train the user on the handheld mute and belt pack mute if you don't want problems. Alert light solves a lot of problems when using these systems, also when scanning a bunch of units, make sure the transmitters are spread out a bit, or you will have a lot of harmonics and run out of channels. I have been using wireless since the 80's and what you get for the $ is incredible, I had a 4 channel Vega system from the 80's, you can buy 12 of these for what those cost. You must read the instructions and understand them to get the best performance out of them. been using these systems for over 9 years. Wish the belt packs and mic cases were metal. But then you would just buy the 4000s....:)


Abilene, Texas


Dropouts plague these systems. Not worth it...


I have 12 of these systems. I have stopped using them. I replaced them all with wired mics, and purchased three choral hanging mics with stand adaptors so I can mic the entire stage with a wired system. I set each receiver's frequency individually so that there were NO conflicts, put in new batteries, and tested the handhelds and the theatermic/bodypac combinations. They worked, but only when there was no one else in the room. The second I put them on my performers, drop-outs galore. The only explanation I can figure is that many of my actors wear hearing aids. They aren't in the same frequency range, but the mics gave me FITS for the entire run of our play. Done with this concept and brand. The only reliable wireless mics I have are vhf not uhf. There is also no depot level maintenance -- I have to send to the factory for any repairs.

Ian the soundguy

Northern California


"A Great System"


I have the ATW 341bc system and I like it a lot. I like the simplicity of set-up. I like the size and shape of the transmitter, it has a great feel to it, it doesn't feel cheap, and it also produces great sound. I have ordered and just received the ATW 371bc condenser transmitter to go along with it. These are the types of transmitter that needs to come with the digital system.


Scottsboro, AL, USA

Great System


I play guitar and sing in a duo. We play winery's, restaurant's and bars. No problems with feedback or signal interference in situations where that had been an issue. The BP892 mic had a different ear mount but after acclimating myself is very comfortable. I have to keep the mic clear from my beard but a very clean natural sound and no problems overdriving it. The adjustments in the receiver and transmitter make for a nice adaptable setup. I'm enjoying it! Steve

Sugarcreek Acoustic Duo

Beach City, OH


Great set of features, sound quality, and value


Purchased set of six hand-held systems for support of an a cappella chorus. Love them! The chorus immediately noted an increase in sound quality over our previous systems. I love the clear readout of channel, AF and RF strength, etc. -- especially the remote battery monitor. That's saved our bacon during performances! Good noise-free handling characteristics.


Philadelphia area

This product is excellent


I purchased this wireless handheld for live vocal applications. The audio quality is great, excellent gain with no feedback issues, no interference. What else can I say, I'm very pleased with this microphone


Hartville, OH, USA

This mic sounds great!


I bought the ATW3141b couple months ago and I'm using at my church. I love the sound quality and the battery meter on the receiver and transmitter.


Framingham, MA, USA

Great versatility and clean power!


We run 10 of these 3000 Series systems with great fun and success! They are powerful clean and have a great roaming range! We never have a problem with them cutting out or interference. The auto scan is fabulous and I rarely have to use squelch. We use them with 4 DPA vocal headsets, Violin, Viola, Bodrans, Taps...ect.


Loudonville, OH, USA

ATW-3131b True Diversity Lavalier Wireless System

4.6 14


Series ATW
Model 3131b
Weight Receiver: 1.1 kg (38.8 oz), without accessories; Transmitter: 81 g (2.9 oz), without batteries
Information not available

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