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System 9

Frequency-agile VHF Wireless Systems

|  U.S. Two-Year Limited End-User Warranty

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.



  • Overview
  • Features
  • Configurations
  • Specifications
  • Downloads
  • Reviews
  • Q & A

  • Overview


    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-R900a receiver and either a body-pack transmitter or handheld microphone/transmitter. The ATW-R900a 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-R900a also offers volume control along with AF Peak, RF and Power indicator lights.
  • Features


    • Easy operation and clear, natural sound quality

    • 4 selectable frequency-coordinated VHF channels

    • Balanced XLR and unbalanced 1/4" output jacks enable use with a wide variety of audio gear

    • Reliable performance and durable construction

    • Advanced dipole antenna system for extended operating range
  • Configurations

    Guitar System
    ATW-901a/G
    ATW-R900a receiver and ATW-T901a body-pack transmitter with AT-GcW guitar/instrument input cable.
    Headworn Microphone System
    ATW-901a/H
    ATW-R900a receiver and ATW-T901a body-pack transmitter with PRO 8HEcW headworn microphone.
    Lavalier Microphone System
    ATW-901a/L
    ATW-R900a receiver and ATW-T901a body-pack transmitter with omnidirectional lavalier microphone.
    Handheld Microphone System
    ATW-902a
    ATW-R900a receiver and ATW-T902a handheld dynamic unidirectional microphone/transmitter. Includes AT8456a Quiet-Flex™ stand clamp.
    Receiver
    ATW-R900a
    System 9 receiver.
    Transmitter
    ATW-T901a
    System 9 body-pack transmitter.
    Transmitter
    ATW-T902a
    System 9 handheld microphone/transmitter with undirectional dynamic element. Includes AT8456a Quiet-Flex™ stand clamp.
  • Specifications

    OVERALL SYSTEM SPECIFICATIONS
    Operating Frequencies VHF highband, 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
    Maximum Simultaneous Use (Recommended) 200' minimum
    RECEIVER SPECIFICATIONS
    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
    Operating Temperature Range 40° F (4° C) to 110° F (43° C)
    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
    BODY-PACK TRANSMITTER SPECIFICATIONS
    RF Power Output10 mW
    Spurious EmissionsFollowing federal and national regulations
    Input ConnectionsFour-pin Locking Connector
    Pin 1: GND
    Pin 2: INST INPUT
    Pin 3: MIC INPUT
    Pin 4: DC BIAS +9V
    BatteriesTwo 1.5V AA
    not included
    Battery Life8 hours (alkaline)
    Depending on battery type and use pattern
    Dimensions2.76" (70.2 mm) W x 4.08" (103.7 mm) H x 0.98" (24.9 mm) D
    Net Weight2.8 oz (80.0 grams)
    without batteries
    HANDHELD TRANSMITTER SPECIFICATIONS
    RF Power Output 10 mW
    Spurious Emissions Following federal and national regulations
    Batteries Two 1.5V AA
    not included
    Battery Life 8 hours (alkaline)
    Depending on battery type and use pattern
    Dimensions 9.91" (251.8 mm) long,
    2.11" (53.5 mm) diameter
    Net Weight 9.2 oz (260 grams)
    without batteries
    Accessory Included AT8456a Quiet-Flex™ stand clamp



    First-generation System 9 (original) components:
    ATW-R900 receiver
    ATW-T901 body-pack transmitter
    ATW-T902 unidirectional dynamic microphone transmitter

    Click here for the original System 9 Owner's Manual.




    Conditions
  • Downloads

    System 9 Wireless Manual ("a" versions) (pdf 592.05 KB)
    System 9 (ATW-R900a) FCC DOC (pdf 1.17 M)
    System 9 Wireless Manual (original version) (pdf 965.56 KB)
    Wireless Mics & Cables
    Wireless System Accessories
    Using Wireless
  • Reviews

  • Q & A