ATW-R900a receiver and ATW-T901a body-pack 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, head-worn, 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 an advanced dipole antenna design for an 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.

• 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

OVERALL SYSTEM SPECIFICATIONS

• 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
• 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 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