WILLIAMS AV FM 557 FM Plus Large-area Dual FM and Wi-Fi assistive listening system with 4 FM R37 receivers and FM T55 transmitter. The WILLIAMS AV FM T55 Plus integrates professional WaveCAST Wi-Fi audio server technology into a Williams Sound FM assistive listening system. End users can now listen with either an FM receiver or with their own smartphone (via the WaveCAST Listening App). Along with this flexibility comes exceptional audio quality, as the FM Plus is built on a professional digital audio (DSP) platform. Added plus: Its optional Dante interface provides integrators with a full audio networking solution.
The FM Plus is designed to support those who want to use their own smartphones and headphones for a more discreet assistive listening experience. Simplicity is also for those who want a more traditional assistive listening system with a dedicated FM receiver and headset. Venues no longer need to choose between providing FM or Wi-Fi assistive listening systems. FM Plus supports both the new iOS and Android WaveCAST Apps - in addition to all of the current and legacy Williams Sound FM receivers operating on the 72-76 MHz bandwidth.
The FM Plus can have most settings changed via the front panel interface, or the hosted web interface. A remote programming guide is upon request.
This version is not Dante compatible. For Dante compatibility, see the FM T55 D.
The FM Plus uses the WaveCAST app to provide an easy-to-use, intuitive user interface. It is in iOS or Android. Listeners easily select channel and volume level once their personal device is connected to the Wi-Fi network. The app does not work on FM Broadcasts.
Features- Seek-button access to all 17 wideband frequencies in the 72-76 MHz bandwidth
- Channel-lock capability
- Battery-saving sleep mode
- Low-battery indicator
- Field tunable
Specifications- Use with: PPA T45,PPA T45NET, PPA T27 Transmitters
- Connector type: F-connector
- Cable type: RG 59 coax
- Nominal Impedance: 75 Ohm
- Total Cable Length: 22 ft
- Active Antenna Length: 80 in
- Style: Around-ear speaker
- Plug: 3.5mm mono
- Cord: 39"
- Driver Size: 23 mm
- Nominal Impedance: 32
- Freq. Response: 20 - 20kHz
- Max Power Input: 30 mW
- Sensitivity: 118 dB @ 1kHz
- Dimension: 8.45" W x 8.25" D x 1.72"H (21.5 cm x 21 cm x 4.4 cm)
- Color: Black/Silver with silver legends on the front, white legends on the back
- Rack Moun: Standard 19 Rack, one EIA rack space high, 1/2 space wide
- Temperature RangeOperating: +32deg F to +122deg F (0deg C to 50deg C); Storage: -4deg F to +158deg F (-20deg C to 70deg C)
- Operating Frequencies: 72.1-75.9 MHz , 17 wideb& channels (selectable)
- Frequency Accuracy: ± 2 ppm stability, 0-50degC
- Deviation: ± 75 kHz maximum
- Pre-Emphasis: 75 microsec
- RF Field Strength: Does not exceed 80 mV/m at 3 m
- Compatible Antennas: ANT 005, ANT 021, ANT 024, or ANT 025
- Transmission Range: Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
- RF Outputs: (1x) #10-32 stud connector in center of unit (pcb mounted) (1x) F-connector on rear chassis
- Audio Processor Functions: DSP based; Compression: 1: 1, 1.5: 1 or 2: 1; High-pass & Low-pass Filter Frequency control
- Frequency Response: 31-16000 Hz, ±3 dB (re: 1 kHz, ±3 dB) ("Music Audio Preset)
- Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
- Weight: 2 lbs