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Audio-Technica ATW-901/L System 9 VHF Wireless Lavalier Microphone System 169.505 to 171.905 MHz

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Long an innovator in wireless technologies, AT's System 9 series reflects a dedication to the art and science of wireless audio. The ATW-901/L consists of an ATW-R900 receiver and ATW-T901 UniPak tran... Read More

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Long an innovator in wireless technologies, AT's System 9 series reflects a dedication to the art and science of wireless audio. The ATW-901/L consists of an ATW-R900 receiver and ATW-T901 UniPak transmitter with omnidirectional lavalier microphone.

Audio-Technica's System 9 is a four-channel frequency-agile wireless system designed to provide rock-solid performance along with easy setup and clear, natural sound quality. Featuring sleek, stackable, contemporary styling, System 9 is available in handheld, headworn, guitar, lavalier and body-pack configurations. The system offers four compatible user-switchable VHF channels (169.505, 170.245, 171.045, and 171.905 MHz).

Each System 9 configuration includes the ATW-R900 receiver and either a body-pack transmitter or handheld microphone/transmitter. The ATW-R900 is a non-diversity, single-channel receiver with advanced dipole antenna design for extended operating range, which improves operation by providing a ground element in addition to the usual signal element. The ATW-R900 also offers volume control along with AF Peak, RF and Power indicator lights.

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:

  • Clear sound
  • Four channels to choose from
  • 200' range
  • Affordable
    Operating Frequencies: VHF high band, 169 MHz to 172 MHz
    Modulation Mode: FM
    Maximum Deviation: +/-10 kHz
    Dynamic Range: >/=90 dB (A-weighted), typical
    Total Harmonic Distortion: <1% (at 1 kHz, +/-10 kHz deviation)
    Operating Range: 200' (60 m) typical
    Open range environment with no interfering signals
    Operating Temperature Range: 40 F (4 C) to 110 F (43 C)
    Battery performance may be reduced at very low temperatures
    Frequency Response: 80 Hz to 13 kHz

    Receiving System: Non-diversity, single-channel, dual antenna system
    Image Rejection: 50 dB minimum
    RF Sensitivity: 20 dBuV at 60 dB S/N ratio (50 ohms termination)
    Audio Output: Nominal Output Level
    XLR, balanced: 350 mV (1 kHz modulation, 10 kHz deviation, 100k ohm load)
    1/4" (6.3 mm), unbalanced: 700 mV (1 kHz modulation, 10 kHz deviation, 100k ohm load)
    Power Supply: 100-240V AC (50/60 Hz) to 12V DC .5A (center positive) switched mode external power supply
    Dimensions: 7.48" (190.0 mm) W x 1.82" (46.2 mm) H x 5.06" (128.5 mm) D
    Net Weight: 12.0 oz (337 grams)
    Accessory Included: Power supply

    RF Power Output: 10 mW
    Spurious Emissions: Following federal and national regulations
    Input Connections: Four-pin Locking Connector
    Pin 1: GND
    Pin 2: INST INPUT
    Pin 3: MIC INPUT
    Pin 4: DC BIAS +9V
    Batteries: Two 1.5V AA
    not included
    Battery Life: 8 hours (alkaline)
    Depending on battery type and use pattern
    Dimensions: 2.76" (70.2 mm) W x 4.08" (103.7 mm) H x 0.98" (24.9 mm) D
    Net Weight: 2.8 oz (80.0 grams) without batteries
One year parts and labor warranty.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
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