WILLIAMS AV FM T55 FM Plus Large-area Dual FM and Wi-Fi Base Transmitter with Network Control

ITEM #: WLS-FM-T55 MFG #: FM T55

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    FM T55 - Overview

    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 available 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 available 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 available 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.

    Note: The FM + connects to the installation location's Wi-Fi Network. It does not provide a network on its own. The Wi-Fi network will need to be installed and established before the FM + can be used.

    • 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:

      • Dimensions: 8.45" W x 8.25" D x 1.72"H (21.5 cm x 21 cm x 4.4 cm)
      • Weight: Transmitter: 3.2 lbs (1.45 kg)
      • Color: Black/Silver with silver legends on the front, white legends on the back
      • Rack Mount: Standard 19” Rack, one EIA rack space high, 1/2 space wide.
      • Power Supply: Desktop Style Transformer (TFP 062); Input: 100-240 VAC, 50/60 Hz. IEC Line Cord; Output: 24 VDC, 750 mA, 18W. 2.5mm ID center positive barrel connector
      • Power ON Indicator: Push On/Push Off latching power button, backlit green indicates power ON, backlight off indicates power OFF, fading from bright to dark indicates Sleep Mode.
      • Temperature Range: Operating: +32° F to +122° F (0° C to 50° C); Storage: -4° F to +158° F (-20° C to 70° C)
      • User Interface: 3.12” High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring.
      • Dante: Only available on FM T55 D
      • Ethernet: RJ-45 on back of unit supports CAT 5e cable lengths up to 328 feet (100 meters); 10/100 Base-T IEEE 802.3 compliant, unique MAC address
      • RF Section
      • Operating Frequencies: 72.1-75.9 MHz , 17 wideband channels (selectable)
      • Frequency Accuracy: ± 2 ppm stability, 0-50° C
      • 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
      • RF Transmit Indicator: 1 Green LED On Air Indicator
      • RF Power: Full, Medium, Low or OFF indiacted by menu icon.
      • RF Time Out (sleep mode): 30 min. duration, 4 hr. duration, or Always On selected via menu. Starts when audio is below -18 dB level with no button pressed for selected duration.

        Audio Section
      • Audio Processor Functions: DSP based; Compression: 1:1, 1.5:1 or 2:1; High-pass and Low-pass Filter Frequency control
      • Frequency Response: 31-16000 Hz, ±3 dB (re: 1 kHz, ±3 dB) (“Music” Audio Preset)
      • Signal-to-Noise Ratio: 67 dB (typical) Transmited RF
      • Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
      • Common Mode Rejection: Greater than 57 dB @ 1 kHz, Mic or Line
      • Audio Inputs: (1x) Combination 3-pin XLR, 1/4" (TRS) jack for balanced or unbalanced line level, or balanced or unbalanced microphone with selectable phantom power
      • Audio Input Gain Adjust: In menu, adjustable to 0 to -50 dB, in 1dB steps
      • Phantom Power: 14.4 VDC applied through 2.2 kOhms resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack
      • Audio Level Indicators: 10-LED?array that reads -18 to +9 dB at 3 dB intervals. 7 Green, 2 Amber, and 1 red LED. Green LEDs indicate normal operating audio level peaks, Amber LEDS indicate close to overload peaks, Red LED indicates overload peaks
      • Headphone Output: 1/4" TRS stereo jack, mono signal, 14.85 mW at +9dB, maximum in 33 Ω (level adjustable in menu 0 to -40 dB in 2 dB steps)
      • Line Output: RCA jack (black), -10 dBV (.32 VRMS); Output impedance 100 ohms at +9dB
      • Input Levels (Bal or Unbal) (at Audio Input Gain = 0dB): Nominal (1st Amber +3 dB LED): Overload Warning (Displayed on Screen): Absolute Max. Rating*
      • Microphone: -55 dBV (1.7 mV RMS): -22 dBV (80 mV RMS): +20 dBV (10.0 V RMS)
      • Line: -25 dBV (55 mV RMS): +16 dBV (6.3 V RMS): +20 dBV (10.0 V RMS)
      • Approvals: FCC, RoHS3, WEEE, Industry Canada
    • Warranty:

      • 2-year parts and labor

    FM T55 - Required Accessories

      FM T55 - Recommended Accessories

      California Residents:
      Cancer and Reproductive Harm - www.P65Warnings.ca.gov