Williams Sound FM 558 FM Plus Large Area Dual FM and Wi-Fi Assistive Listening System, Includes FM T55 Transmitter, 4x PPA R38N Receivers

SKU: WSFM558 MFR: FM 558
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Key Features

  • Ensure clear audio for all with this FM assistive listening system, perfect for large venues.
  • Dual FM and Wi-Fi provide reliable audio, enhancing accessibility for diverse listening needs.
  • Includes 4 FM receivers & neckloops, offering immediate assistive listening for multiple users.
  • The FM T55 transmitter delivers up to 1000' range, ensuring broad coverage for any event space.
  • Easy to use interface with high-resolution OLED display simplifies setup and operation for all users.
  • ADA wall plaque included, promoting your commitment to accessibility with this assistive system.
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Williams Sound FM 558 Specifications

FM T55 Transmitter: General

FM T55 Transmitter: General

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  • 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 F (0 to 40 Degree C)
    Storage: -4 to 158 Degree F (-20 to 70 Degree C)

  • User Interface

    3.12" High Resolution OLED display with selections via buttons. Hosted Web page. Remote control and monitoring

  • 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

FM T55 Transmitter: RF

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  • Operating Frequencies

    72.1-75.9 MHz , 17 wideband channels (selectable)

  • Frequency Accuracy

    +/- 2 ppm stability, 0-50 Degree 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' (304m) 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

FM T55 Transmitter: Audio

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  • 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 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

FM T55 Transmitter: Input Levels

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  • 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: +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: +20 dBV (10.0 V RMS)

FM T55 Transmitter: Physical

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  • Dimensions (W x D x H)

    8.45 x 8.25 x 1.72" (21.5 x 21 x 4.4cm)

  • Weight

    3.2 lb (1.45kg)

PPA R38N Receiver

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  • Color

    Black/Silver. Black ABS Plastic case with Aluminum faceplate

  • Battery Type

    2 AA Alkaline or 2 AA NiMH Rechargeable

  • Battery Life

    2 AA non-rechargeable alkaline batteries (BAT 001-2), approx. 50 hrs.
    2 AA rechargeable NiMH batteries (BAT 026-2), 1500mAh, approx. 32 hrs.

  • Current Consumption

    52 mA nominal

  • Operating Temp. Range

    32 - 122 Degree F (0 to 50 Degree C)

  • Channels

    17 Wideband, accessed via menu

  • 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

  • FM Deviation

    75 kHz

  • De-Emphasis

    75 microS

  • Display Screen

    1" OLED

  • Power Indication

    Power button, backlit green. Good battery strength - glows solid. Low battery -flashes

  • Sensitivity

    2 microV at 12 dB Sinad with squelch defeated

  • Input Overload

    100 mV

  • Frequency Response

    200 Hz - 15 kHz, +/-3dB

  • Modulation

    FM, +/- 75 kHz peak deviation

  • Signal-to-Noise Ratio

    Minimum 65 dB @ 1.0V

  • Receive Antenna

    Integral with earphone/headphone cord

  • Audio Output

    35 mW max at 16 O

  • Headphone Connector

    3.5mm stereo jack, mono output for stereo or mono earphones/headphones

  • Supplied Earphone

    Stereo,earbud-type with foam cushion, 3.5 mm plug, 32 O

  • Power Save Mode

    Enters sleep mode after approximately 3 minutes of no RF signal

  • Approvals

    FCC, Industry Canada, RoHS, WEEE

  • Dimensions

    4.1 x 2.85 x 1.38" (104 x 72 x 35mm)

  • Weight

    4.6 oz (130g) (With batteries)
    2.6 oz (73g) (Without batteries)

EAR 022 Surround Earphone

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  • Style

    Around-ear speaker

  • Plug

    3.5mm mono

  • Cord

    39" (99.06cm)

  • Driver Size

    23mm

  • Nominal Impedance

    32O

  • Frequency Response

    20 - 20 kHz

  • Max Power Input

    30 mW

  • Sensitivity

    118 dB @ 1kHz

  • Weight

    0.5 oz (15g)

NKL 001 Neckloops

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  • Color

    Black

  • Cord Length

    18.5" (46.9cm)

  • Connector

    NKL 001: 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

  • Weight

    1.5 oz (42.5g)

IDP 008 ADA Wall Plaque

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  • Dimensions (L x W x H)

    10.37 x 6.25 x 0.13" (26.3 x 15.8 x 0.31cm)

About Williams Sound FM 558

Experience the pinnacle of assistive listening technology with the FM 558 FM Plus Large Area Dual FM and Wi-Fi Assistive Listening System. This advanced system seamlessly integrates the professional WaveCAST Wi-Fi audio server technology with a robust Williams Sound FM assistive listening system, offering unparalleled flexibility and exceptional audio quality. Built on a professional digital audio (DSP) platform, the FM Plus caters to both individuals who prefer using their own smartphones via the WaveCAST Listening App and those who opt for a traditional assistive listening experience with a dedicated FM receiver and headset.

The FM T55 Transmitter is the heart of this innovative system, supporting both iOS and Android WaveCAST Apps, in addition to all current and legacy Williams Sound FM Receivers operating on the 72-76 MHz bandwidth. With its user-friendly interface, listeners can effortlessly select their desired channel and adjust the volume level once connected to the Wi-Fi network. The transmitter boasts an intuitive front panel interface and a hosted web interface for easy configuration, ensuring a seamless setup process.

The PPA R38N Receiver is a testament to high-quality, durable design, featuring a high-resolution OLED screen for a clear view of receiver status and user settings. With on-screen channel selection and access to 17 pre-set, wideband frequencies, this receiver ensures digitally synthesized audio clarity and stability. The digital tuning, digital squelch, and battery-saving sleep mode make it a reliable choice for extended use. Additionally, the new stereo jack, paired with the traditional mono jack, expands compatibility with a variety of earphones and headphones.

Enhance your listening experience with the EAR 022 Surround Earphone, designed to hang on the outside of the ear, delivering excellent sound quality. Compatible with all Williams Sound Receivers and Pocketalkers, these earphones have been rigorously tested for quality, reliability, and compatibility.

For users with T-Coil-equipped hearing aids, the NKL 001 Neckloop offers an optimal solution. This neckloop is engineered to magnetically couple the audio output from a Williams Sound unit into the hearing aid, ensuring a clear and amplified sound. The integrated safety breakaway feature adds an extra layer of security, disconnecting the neckloop in case it becomes entangled, providing peace of mind for the user.

Lastly, the IDP 008 ADA Wall Plaque is a professional and refined touch to any venue, signaling the availability of a hearing assistance system. This self-adhesive, easy-to-see wall plaque is perfect for theaters, auditoriums, and other public spaces, ensuring patrons are aware of the assistive listening options at their disposal.

The FM 558 FM Plus Large Area Dual FM and Wi-Fi Assistive Listening System is the ultimate choice for venues seeking to offer an inclusive audio experience without having to choose between FM or Wi-Fi assistive listening systems. It's a user-friendly, versatile solution that caters to the diverse needs of individuals with hearing impairments in large areas.

Williams Sound FM 558 Features

  • FM T55 Transmitter: System 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
  • FM T55 Transmitter: Wi-Fi Features
  • 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
  • FM T55 Transmitter: FM Features
  • Up to 1000 foot operating range
  • Adjustable RF power output
  • Professional DSP audio platform
  • Works with existing Williams Sound FM receivers
  • PPA R38N Receiver Features
  • OLED high-resolution screen - easy to read and provides a quick view of receiver status
  • All user settings are accessible via the on-screen menu - including all 17 wideband channels
  • Stylish new design
  • Now features stereo headphone jack
  • Rechargeable or non-rechargeable batteries
  • Digital Volume Controls
  • 4-step battery level indication
  • Display shows channel or frequency
  • Step/seek function allows user to increment channel manually, or seek to the next active channel
  • Sleep Mode/Auto-Off saves battery power
  • Soft Audio Turn-On
  • EAR 022 Surround Earphone Features
  • Hangs on outside of the ear
  • Excellent sound quality
  • 3.5mm mono plug
  • 1m cord
  • Monoaural
  • 32 Ohm
  • Recommended for FM receivers and select IR receivers
  • Designed for individuals with mild and low gain hearing loss
  • NKL 001 Neckloops Features
  • Integrated safety breakaway device
  • 18" Cord
  • Adult size
  • 3.5mm plug
  • monoaural
  • 8-16 ohm
  • Recommended for PockeTalkers, FM receivers and select IR receivers
  • For individuals with moderate to severe hearing loss

Warranty Information

This product has a limited warranty of 24 months.

Product Documents

User Manual

Key Features

  • Ensure clear audio for all with this FM assistive listening system, perfect for large venues.
  • Dual FM and Wi-Fi provide reliable audio, enhancing accessibility for diverse listening needs.
  • Includes 4 FM receivers & neckloops, offering immediate assistive listening for multiple users.
  • The FM T55 transmitter delivers up to 1000' range, ensuring broad coverage for any event space.
  • Easy to use interface with high-resolution OLED display simplifies setup and operation for all users.
  • ADA wall plaque included, promoting your commitment to accessibility with this assistive system.

What's in the box:

  • FM T55 Transmitter
  • 4x PPA R38N Receivers
  • 4x CLP 023 Belt Clips
  • 4x EAR 022 Surround Earphones
  • 2x NKL 001 Neckloops
  • IDP 008 ADA Wall Plaque
  • Williams Sound 2 Year Warranty on Parts and Labor (90 Day Warranty on Accessories and 1 Year Warranty on Neckloop and Lifetime Limited Warranty on Receiver)