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Audio-Technica System 9 VHF Wireless Unipak System ATW-901
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Audio-Technica System 9 VHF Wireless Unipak System ATW-901

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Product Description

The Audio-Technica System 9 VHF Wireless Unipak System is designed for live sound reinforcement applications. The system consists of a wireless VHF receiver, a bodypack transmitter, and your choice to add a wireless microphone or instrument cable to complete the system. The receiver utilizes two dipole antennas for extended range, and allows you to select your VHF transmission frequency from 169.505, 170.245, 171.045, or 171.905 MHz. The receiver includes LED indicator lights for channel, RF, and AF peak. The back of the receiver includes a volume control knob, a squelch control knob, a balanced XLR audio output, and an unbalanced 1/4" audio output. The receiver also includes a power cord hook to prevent accidental pull-out of the DC power supply.

The bodypack transmitter is powered by two AA batteries and includes variable microphone and instrument trim, channel selection DIP switches, a Power/Mute button, and a Unipak input connector.

Four Selectable VHF Transmission Frequencies Select from 169.505, 170.245, 171.045, 171.905 MHz Dipole Antenna for Extended Range The receiver utilizes two antennas to improve the range of the system Squelch Control The receiver features a squelch adjustment knob that controls the threshold for the radio signal that regulates audio output. If the radio signal from the microphone drops below the threshold, the squelch control mutes the audio output to prevent the transmission of radio interference and white noise from entering the speakers

Overall System

  • Type VHF High Band
  • Operating Frequencies 169.505, 170.245, 171.045, 171.905 MHz
  • Modulation Mode FM
  • Maximum Deviation ㊣10 kHz
  • Dynamic Range ≡90 dB (A-weighted), typical
  • Operating Range 200' (61.0 m), open range environment with no interfering signals
  • Operating Temperature Range 40 to 110∼ F (4 to 43∼ C), battery performance may be reduced at very low temperatures
  • Frequency Response 80 to 13,000 Hz

Receiver Specifications

  • Receiving System Non-diversity, single-channel, dual-antenna system
  • Image Rejection 50 dB minimum
  • Audio Output Nominal Output Level
  • Balanced XLR: 350 mV (1 kHz modulation, 10 kHz deviation, 100 k次 load)
  • Unbalanced 1/4" (6.3 mm): 700 mV (1 kHz modulation, 10 kHz deviation, 100 k次 load)
  • Power Supply 100 to 240 VAC (50/60 Hz) to 12 VDC at 0.5A (center positive) switched mode external power supply
  • Dimensions (W x H x D) 7.48 x 1.82 x 5.06" (190 x 46.2 x 129 mm)
  • Weight 12.0 oz (337 g)

Bodypack Transmitter

  • RF Power Output High: 10 mW
  • Spurious Emission 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)
  • Current Consumption 8 hours (alkaline), depending on battery type and use pattern
  • Dimensions (W x H x D) 2.76 x 4.08 x 0.98" (70.2 x 104 x 24.9 mm)
  • Weight 2.8 oz (79 g) (without batteries)

Packaging Info

  • Package Weight 2.6 lb
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