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3000 Series IEM


The Audio-Technica 3000 Series Wireless In-Ear Monitor System (ATW-3255) was designed to bring professional sound quality and features to all levels of performers and performance venues. System integrators for houses of worship, owners of live-performance venues and the musicians who play in them all tell us the same thing: They need an affordable, durable in-ear monitor system that is easy to use and, crucially, delivers high-quality sound with dependable RF.

3000 Series IEM Features

  • Durable wireless in-ear monitor system delivers high-quality sound and stable RF
  • Ideal for use in houses of worship and performance venues 
  • Optimized internal digital signal processing provides exceptional stereo separation 
  • Wide UHF tuning bandwidth of 138 MHz for maximum versatility in an increasingly congested RF environment; available in frequency bands DF2 (470 – 608 MHz) and EG2 (580 – 714 MHz)
  • Shares design elements with the 3000 Series UHF Wireless Systems for easy integration and compatibility
  • Transmitter and receiver include OLED screens for optimal readout of key settings and alerts
  • Offers network monitoring and control via Wireless Manager software
  • A channel plan can be deployed to all network-connected transmitters via an RF scan from a single receiver, with no interference or third-order intermodulation 
  • Body-pack receiver operates continuously for up to 7 hours when powered by NiMH batteries and charged in the ATW-CHG3 or ATW-CHG3N charging station (sold separately)
  • Stereo or mono operation with pan/personal mix controls
  • Receiver is equipped with an efficient headphone amp to ensure clear, natural sound quality
  • Custom audio settings include EQ, limiter, gain control and balance
  • Receiver’s antenna diversity improves RF stability
  • Included ATH-E40 professional in-ear monitor headphones feature propriety dual phase push-pull drivers for exceptional accuracy and clarity
  • Transmitter is equipped with balanced XLR inputs and loop output, plus network port

3000 Series IEM Specifications

Overall System
Operating FrequenciesBand DF2: 470.125 to 607.875 MHz Band EG2: 580.000 to 713.850 MHz
Minimum Frequency Step25 kHz
Modulation ModeFM
Nominal/Peak Deviation±34 kHz nominal / ±45 kHz peak
Frequency Response40 Hz to 14,100 Hz
Stereo Separation75 dB
Operating Range90 m (300′)
Open range environment with no interfering signals
Dynamic Range>90 dB, A-weighted, typical
Total Harmonic Distortion<0.2% (at 1 kHz, +4dBu input)
Maximum Simultaneous Use (recommended)49 ch per band
For assistance with multi-band operation or other frequency coordination issues, contact your local Audio-Technica dealer.
NotesFor product improvement, the product is subject to modification without notice.
IEM Transmitter
RF Output PowerHigh: 50 mW, Low: 10 mW (switchable) at 50 ohms
May differ depending on the country or region in which you live.
Input ConnectionXLR-F type×2 (Pin1: GND, Pin2: Hot, Pin3: Cold)
Maximum Input LevelXLR-F type: +24 dBu (at 0 dB sensitivity)
Output Connection6.3 mm (1/4″) TRS×2 (Tip: Hot, Ring: Cold, Sleeve: Ground)
Network PortRJ-45
Power Supply100 to 240 V AC (50/60 Hz) to 12V DC 1 A (center positive) switched mode external power supply
Antenna OutputBNC-type, 50 ohms
Dimensions210 mm (8.3″)×191 mm (7.5″)×43.4 mm (1.7″) (W×D×H)
Weight1,100 g (39 oz)
(without accessories)
Included AccessoriesAC adapter Rack-mount (large, small) Flexible UHF antenna
Receiving SystemAntenna diversity
Audio output cable performs as a secondary antenna to ensure stable RF performance.
Image Rejection>80 dB, typical
RF Sensitivity20 dBuV at 60 dBA S/N ratio (50 ohms termination)
Headphone Output Jack3.5 mm (1/8″) TRS stereo mini-jack
Headphone Output40 mW (at 12 ohms)
EQLow: 80 Hz / 160 Hz / 320 Hz / ±9 dB in 3 dB step High: 6 kHz / 8 kHz / 10 kHz / ±9 dB in 3 dB step
LimiterSelectable: -30dB to OFF (0 dB) in 6 dB steps
Antenna InputSMA type, 50 ohms
Operating Temperature Range-5℃ to +45℃ (23℉ to 113℉)
Battery performance may be reduced at very low temperatures.
Dimensions64 mm (2.5″)×23 mm (0.91″)×82 mm (3.2″) (W×D×H)
Weight102 g (3.6 oz) (without batteries)
Accessories IncludedATH-E40
Battery Current/Life4 to 6 hours (alkaline); 5 to 7 hours (Ni-MH, 1900 mAh); 11 to 13 hours (Lithium)
Depending on battery type, usage, volume level and environmental conditions.
Battery Type3 V DC (two 1.5 V AA) (not included)

3000 Series IEM Warranty & Repair

Audio Technica is committed to customer satisfaction, offering a one-year warranty on all its products. This assurance reflects their confidence in the quality and durability of their audio equipment. Whether you’re investing in headphones, microphones, , you have peace of mind for a full year.


With Audio Technica’s one-year warranty, you’re protected against unexpected defects and malfunctions, ensuring a worry-free audio experience. Their dedication to quality and craftsmanship shines through in every product they offer. Trust in Audio Technica for reliable and long-lasting audio solutions, backed by a generous warranty.

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