Audio-Technica ATW-T901A System 9 wireless system body-pack transmitter. is backordered and will ship as soon as it is back in stock.
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Product Overview
The Audio-Technica ATW-T901A is a frequency-agile VHF body-pack transmitter for the System 9 wireless platform. Although it operates as a single-channel transmitter, it lets you select any one of four coordinated frequencies, so up to four System 9 systems can run simultaneously when each is set to a different channel. Paired with a System 9 receiver and a 4-pin lavalier, headset microphone, or instrument cable, it captures audio for presentation, ENG, and sound reinforcement applications. The result is easy operation and clear, natural sound quality in a durable body-pack package.
Product Description

The ATW-T901A is the body-pack transmitter component of the Audio-Technica System 9 frequency-agile VHF wireless system. As a single-channel transmitter it is straightforward to deploy, yet its frequency-agile design allows selection among four factory-coordinated VHF frequencies: 169.505, 170.245, 171.045, and 171.905 MHz. Setting each transmitter and receiver pair to a different frequency lets up to four System 9 systems operate at the same time in the same space. The transmitter accepts a 4-pin input, so it works with an optional 4-pin lavalier microphone, headset microphone, or the AT-GcW guitar/instrument input cable, each sold separately. This flexibility makes it suitable for lecterns, houses of worship, classrooms, and field production where a wired connection is impractical. Integrators specifying System 9 components can review compatible Audio-Technica wireless hardware through the ATW-T901A transmitter listing at Creation Networks. The body-pack is built for reliable performance and durable construction in everyday use. It pairs with a System 9 receiver to complete a working wireless channel.
Key Features
- Frequency-Agile VHF Operation — The transmitter lets you select any one of four coordinated frequencies for flexible channel planning.
- Four Selectable Frequencies — Choose among 169.505, 170.245, 171.045, and 171.905 MHz to run up to four System 9 systems simultaneously.
- Versatile 4-Pin Input — The transmitter accepts a 4-pin lavalier microphone, headset microphone, or AT-GcW guitar/instrument input cable, each sold separately.
- Body-Pack Form Factor — The compact body-pack design is suited to presentation, ENG, and sound reinforcement applications.
- Clear, Natural Sound Quality — The System 9 platform is engineered for easy operation and clear, natural audio.
- Durable Construction — The transmitter is built for reliable performance in regular professional use.
Technical Specifications
| Type | Frequency-agile VHF body-pack transmitter |
| System | Audio-Technica System 9 |
| Channels | Single channel, frequency-agile |
| Selectable Frequencies | 169.505, 170.245, 171.045, 171.905 MHz |
| Simultaneous Systems | Up to four (each on a different frequency) |
| Input Connector | 4-pin (for lavalier, headset, or AT-GcW instrument cable, sold separately) |
Specifications sourced from Audio-Technica (audio-technica.com).
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