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Description
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.
Specifications
Overall System
Operating Frequencies VHF highband, 169 MHz to 172 MHz
Modulation Mode FM
Maximum Deviation +/-10 kHz
Frequency Response 80 Hz to 13 kHz
Operating Range 200′ (60 m) typical
Open range environment with no interfering signals
Total Harmonic Distortion <1% (at 1 kHz, +/-10 kHz deviation)
Operating Temperature Range 40° F (4° C) to 110° F (43° C)
Battery performance may be reduced at very low temperatures
Notes 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.
Handheld Transmitter
RF Power Output 10 mW
Spurious Emissions Following federal and national regulations
Battery Type 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
Accessories Included AT8456a Quiet-Flex™ stand clamp
Body Pack
RF Power Output 10 mW
Battery Life 8 hours (alkaline)
Depending on battery type and use pattern
Battery Type Two 1.5V AA
not included
Dimensions 2.76″ (70.2 mm) W x 4.08″ (103.7 mm) H x 0.98″ (24.9 mm) D
Input Connections Four-pin Locking Connector
Pin 1: GND
Pin 2: INST INPUT
Pin 3: MIC INPUT
Pin 4: DC BIAS +9V
Net Weight 2.8 oz (80.0 grams)
without batteries
Spurious Emissions Following federal and national regulations
Receiver
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)
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
Weight 12.0 oz (337 grams)
Accessories Included Power supply
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)
