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Electronics > Audio > Home Audio > Audio Systems > Williams Sound FM 557-24 PRO FM Plus Large-Area Dual FM And Wi-Fi Assistive Listening System With 24 FM R37 Receivers, Features Coaxial Cable And Rack Panel Kit For Professional Installation, Includes Transmitter, Receivers, Surround Earphones, Neckloops, 12-Bay Chargers, AA NiMH Rechargeable Batteries, Remote Coaxial Antenna, ADA Wall Plaque And Rack Panel Kit, Replaces FM 457-24 PRO (WILLIAMSSOUNDFM55724PRO WILLIAMS SOUND FM-557-24-PRO PLUS ASSISTIVE LISTENING SYSTEMS PRO)
Williams Sound FM 557-24 PRO FM Plus Large-Area Dual FM And Wi-Fi Assistive Listening System With 24 FM R37 Receivers, Features Coaxial Cable And Rack Panel Kit For Professional Installation, Includes Transmitter, Receivers, Surround Earphones, Neckloops, 12-Bay Chargers, AA NiMH Rechargeable Batteries, Remote Coaxial Antenna, ADA Wall Plaque And Rack Panel Kit, Replaces FM 457-24 PRO (WILLIAMSSOUNDFM55724PRO WILLIAMS SOUND FM-557-24-PRO PLUS ASSISTIVE LISTENING SYSTEMS PRO)
Williams Sound FM 557-24 PRO FM Plus Large-Area Dual FM And Wi-Fi Assistive Listening System With 24 FM R37 Receivers, Features Coaxial Cable And Rack Panel Kit For Professional Installation, Includes Transmitter, Receivers, Surround Earphones, Neckloops, 12-Bay Chargers, AA NiMH Rechargeable Batteries, Remote Coaxial Antenna, ADA Wall Plaque And Rack Panel Kit, Replaces FM 457-24 PRO (WILLIAMSSOUNDFM55724PRO WILLIAMS SOUND FM-557-24-PRO PLUS ASSISTIVE LISTENING SYSTEMS PRO)

SKU: WILLIAMSSOUNDFM55724PRO

Brand: Williams Sound

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Williams Sound FM 557-24 PRO FM Plus Large-Area Dual FM And Wi-Fi Assistive Listening System With 24 FM R37 Receivers, Features Coaxial Cable And Rack Panel Kit For Professional Installation, Includes Transmitter, Receivers, Surround Earphones, Neckloops, 12-Bay Chargers, AA NiMH Rechargeable Batteries, Remote Coaxial Antenna, ADA Wall Plaque And Rack Panel Kit, Replaces FM 457-24 PRO; Professional audio inputs: 1/4"/XLR, phantom power, line level output jack; Audio presets: hearing assistance, music, voice and custom; 16-bit DAC provides 48Khz sample rate; 10 segment LED bar graph; Single-channel audio streaming over Wi-Fi; True professional audio interface; Supports 45 users in unicast mode or 1500+ users in multicast mode; Works with free WaveCAST iOS or Android apps; Up to 1000' operating range; Adjustable RF power output; Professional DSP audio platform; Works with existing Williams Sound FM receivers; 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; Hangs on outside of the ear; Excellent sound quality; 1m cord; Monoaural; 32 ohm; Designed for individuals with mild and low gain hearing loss; Integrated safety breakaway device; 18" Cord; Adult size; 3.5mm plug; 8-16 ohm; Recommended for PockeTalkers, FM receivers and select IR receivers; For individuals with moderate to severe hearing loss; Dimensions (WxDxH): 8.45" x 8.25" x 1.72"; Weight: 22 lbs

General Information
Manufacturer Williams Sound
Manufacturer Part Number FM 557-24 PRO
Product Name FM Plus Large-Area Dual FM And Wi-Fi Assistive Listening System With 24 FM R37 Receivers, Features Coaxial Cable And Rack Panel Kit For Professional Installation, Includes Transmitter, Receivers, Surround Earphones, Neckloops, 12-Bay Chargers, AA NiMH Rechargeable Batteries, Remote Coaxial Antenna, ADA Wall Plaque And Rack Panel Kit, Replaces FM 457-24 PRO
UPC Code
Overview
The Williams FM 557-24 PRO is an FM Plus Large-area Dual FM and Wi-Fi assistive listening system with 24 FM R37 receivers. It features coaxial cable and rack panel kit for professional installation. The new FM 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 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 new FM Plus is designed to support those who want to use their 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. The 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 Dante interface provides integrators with a fully digital audio networking solution. It is based on the Audinate UXT Ultimo chipset. This chipset supports both AES67 and SMPTE 2110. Danteís Ultimo UXT support of AES67 and SMPTE 2110 allows integrators multiple audio options to chose from for greater interoperability with other audio equipment with their system design. This allows the FM Plus Dante to be controlled by the Dante Controller - the easy-to-use software from Audinate for setting up and managing audio routing of Dante-enabled products on an audio network

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. The FM Plus uses the WaveCAST app to provide an easy-to-use, intuitive user interface. It is available on iOS or Android. Listeners easily select channel and volume level once their device is connected to the Wi-Fi network. The app does not work on FM Broadcasts

The FM Plus uses the WaveCAST app to provide an easy-to-use, intuitive user interface. It is available on iOS or Android. Listeners easily select channel and volume level once their device is connected to the Wi-Fi network. The app does not work on FM Broadcasts
Features
  • Professional audio inputs: 1/4"/XLR, phantom power, line level output jack
  • Audio presets: hearing assistance, music, voice and custom
  • 16-bit DAC provides 48Khz sample rate
  • 10 segment LED bar graph
  • Single-channel audio streaming over Wi-Fi
  • True professional audio interface
  • Supports 45 users in unicast mode or 1500+ users in multicast mode
  • Works with free WaveCAST iOS or Android apps
  • Up to 1000' operating range
  • Adjustable RF power output
  • Professional DSP audio platform
  • Works with existing Williams Sound FM receivers
  • 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
  • Hangs on outside of the ear
  • Excellent sound quality
  • 1m cord
  • Monoaural
  • 32 ohm
  • Designed for individuals with mild and low gain hearing loss
  • Integrated safety breakaway device
  • 18" Cord
  • Adult size
  • 3.5mm plug
  • 8-16 ohm
  • Recommended for PockeTalkers, FM receivers and select IR receivers
  • For individuals with moderate to severe hearing loss
  • Specification
    Description
    FM Plus Assistive Listening System with 24 FM R37 Receivers
    System Includes
    1 FM T55 Transmitter
    24 PPA R37N Receivers
    24 EAR 022 Surround Earphones
    6 NKL 001 Neckloop
    2 CHG 3512 12-Bay Chargers
    24 BAT 026-2 AA NiMH Rechargeable Batteries
    1 ANT 005 Remote Coaxial Antenna
    1 IDP 008 ADA Wall Plaque
    1 RPK 005 Rack Panel Kit
    Markets
    Houses of Worship
    Education: Lecture Halls/Classrooms
    Government: City Halls
    Stadiums/Performance Venues
    Applications
    Assistive Listening
    Interpretation
    Audio Description
    Presentation
    Education/Training
    FM T55 Transmitter
    General

    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
    1-2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits
    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 to +104 Degree Fahrenheit
    Storage: -4 to +158 Degree Fahrenheit
    User Interface 3.12" High Resolution OLED display with selections via buttons
    Hosted Web page
    Remote control and monitorin
    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
    Approvals
    FCC, RoHS3, WEEE, Industry Canada
    RF Section
    Operating Frequencies
    72.1-75.9 MHz , 17 wideband channels (selectable)
    Frequency Accuracy
    +/- 2 ppm stability, 0-50 Degree Celsius
    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 (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
    RF Outputs
    10-32 stud connector in center of unit (pcb mounted)
    F-connector on rear chassis
    RF Transmit Indicator
    1 Green LED On Air Indicator
    RF Power
    Full, Medium, Low or OFF indicated 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) Transmitted RF
    Total Harmonic Distortion
    Less than 0.25 percent at 1 kHz (RF output)
    Common Mode Rejection
    Greater than 57 dB at 1 kHz, Mic or Line
    Audio Inputs
    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 O (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
    Audio Section Input Levels
    Microphone (at Audio Input Gain = 0dB)
    Nominal (1st Amber LED): -55 dBV (1.7 mV RMS)
    Overload Warning (Displayed on Screen): -15 dBV (180 mV RMS)
    Absolute Max. Rating (Stresses above these ratings may cause permanent damage or degrade reliability): +20 dBV (10.0 V RMS)
    Line (at Audio Input Gain = 0dB) Nominal (1st Amber LED): -25 dBV (55 mV RMS)
    Overload Warning (Displayed on Screen): +16 dBV (6.3 V RMS)
    Absolute Max. Rating (Stresses above these ratings may cause permanent damage or degrade reliability): +20 dBV (10.0 V RMS)
    Specifications are subject to change without notice
    PPA R37N Receivers
    Color
    Black
    Battery Type
    2x AA Alkaline or 2 x AA NiMH
    Battery Life
    (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs
    (2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs
    Current Consumption
    52mA nominal
    Temperature Range
    - 0 to 50C
    Channels
    17, accessed via seek button in battery compartment
    Operating Frequencies
    72.1, 72.2, 72.3, 72.4, 72.5, 72.6, 72.7, 72.8, 72.9, 74.7, 75.3, 75.4, 75.5, 75.6, 75.7, 75.8, 75.9 MHz
    Intermediate Freq.
    75 kHz
    FM Deviation
    75 kHz
    De-Emphasis
    75 microS
    LED Indicator
    Power: Green
    Low Battery: Flashes Green
    AFC Range
    +/- 120 kHz
    Sensitivity
    2 microV at 12 dB Sinad with squelch defeated
    Input Overload
    100 mV
    Frequency Response
    200-15 kHz
    Modulation
    FM, +/- 75 kHz peak deviation
    Signal-to-Noise Ratio
    65 dB min at 100 uV
    Receive Antenna
    Integral with earphone/headphone cord
    Audio Output
    35 mW max, peak into 16 ohms
    Output Connector
    3.5mm stereo/mono phone jack
    Earphone
    Earbud-type with foam cushion, 3.5 mm plug, 32 O
    Auto Shut-off
    Enters sleep mode after approx 6 mins of no RF signal
    Approvals
    FCC, Industry Canada, RoHS, WEEE
    Weight
    With batteries: 4.6 oz
    Without batteries: 2.6 oz
    EAR 022 Surround Earphones
    Style
    Around-ear speaker
    Plug
    3.5mm mono
    Cord
    39"
    Driver Size
    0.9"
    Nominal Impedance
    32 Ohm
    Freq. Response
    20-20kHz
    Max Power Input
    30 mW
    Sensitivity
    118 dB at 1kHz
    NKL 001 Neckloop
    Color
    Black
    Connector
    3.5mm mono plug
    Impedance
    8-16 Ohms
    Input Power
    500 mW max
    Magnetic Field Strength
    25 mW input at 1000 Hz produces 1.7 A/m 6" above the center of loop
    85microW input produces 0.1 A/m (IEC Standard)
    Approvals
    RoHS, WEEE
    Length
    18.5" cord
    CHG 3512 12-Bay Charger
    Color
    Black ABS
    Power Supply Input
    90-240 VAC input
    Power Supply
    TFP 037 Switching AC adapter, 5 VDC - 4A output
    Charging Rate
    16 Hour Charge: 140 mA
    Pulse/Maintain: 140 mA
    Charging Time
    16 hours nominal
    Unit Capacity
    12 Units
    Indicators
    Individual Charging Indicators: Red LEDs
    LEDs blink when batteries are charged
    Approvals
    CE, WEEE, RoHS
    Weight
    1.2 lb, excluding power supply
    BAT 026-2 AA NiMH Rechargeable Batteries
    Package Quantity
    2
    Battery chemistry
    NiMH
    Voltage
    1.2V
    Battery capacity
    1500mAh
    Compatibility - 1
    BAT KT33V Charger
    BAT KT63V Dual Charger Unit
    FM ADA KIT 37 RCHFM ADA Compliance Kit Rechargeable
    PFM 330Motiva Personal FM Listening System
    PFM 330 RCHMotiva Personal FM Listening System
    PFM 360Motiva Personal FM Listening System
    PFM 360 RCHMotiva Personal FM Listening System
    PFM 863Hearing Helper Personal FM System
    PFM R33Motiva FM Receiver
    PFM T36Motiva FM Transmitter
    PKT D1 E08Pocketalker Ultra with earphone
    PKT D1 E14Pocketalker Ultra with dual mini earbud
    Compatibility - 2
    PKT D1 EHPocketalker Ultra with earbud and headphone
    PKT D1 H26Pocketalker Ultra with rear-wear headphone
    PKT D1 N01Pocketalker Ultra with Neckloop
    PKT D1-0Pocketalker Ultra (no earphone / headphone)
    PKT PRO1-0Pocketalker PRO (no earphone/ headphone)
    PKT PRO1-1Pocketalker PRO with wide-range earphone
    PKT PRO1-2Pocketalker PRO with single mini earbud
    PKT PRO1-3Pocketalker PRO with folding headphone
    PPA R35-8NPersonal PA FM 8-ch Receiver
    PPA R37PPA Select FM Receiver
    Compatibility - 3
    PPA T36Personal PA Body-pack Transmitter
    R863Hearing Helper FM Receiver
    T863Hearing Helper FM Assistive Listening Transmitter
    WIR RX22-4NSoundPlus 4-channel Infrared Receiver
    ANT 005 Remote Coaxial Antenna
    Use with
    PPA T45,PPA T45NET, PPA T27 Transmitters
    Connector type
    F-connector
    Cable type
    RG 59 coax
    Nominal Impedance
    75 Ohm
    Active Antenna Length
    80"
    Cable Length
    22'
    IDP 008 ADA Wall Plaque
    Compatibility
    FM ADA KIT 1 Large-Area Value Kit
    FM ADA KIT 37 FM ADA Compliance Kit
    FM ADA KIT 37 RCH FM ADA Compliance Kit, Rechargeable
    IR ADA KIT Infrared ADA Compliance Kit
    RPK 005 Rack Panel Kit
    Compatibility
    MOD 232 2-channel Infrared Modulator
    PPA T35 Personal PA Base-station Transmitter
    T800 Hearing Helper Base-Station Assistive Listening Transmitter
    Weight and Dimensions
    Dimensions (WxDxH)
    8.45" x 8.25" x 1.72"
    Weight
    22 lbs
    A20200415-1685-200-L

    *This item is BRAND NEW - not refurbished. It comes with all manufacturer supplied accessories, and full manufacturer's USA warranty.
    *** DISCLAIMERS: 1) Availability is not always guaranteed: Please call or email us to double-check stock before placing your order. We ship from our inventory and also drop-ship from hundreds of suppliers. We try very hard to show only available products but sometimes products sell out before we can update the product webpage.  2) Some information may have been supplied by 3rd Party Content Suppliers: We are not responsible for Data or Image errors.  3) We do not offer Installation, Training or Technical Support on this product.***

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