FM 558-24 PRO – FM Plus Assistive Listening Systems

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The FM 558-24 PRO Assistive Listening system from Williams Sound contains everything you need to get up and running with ADA- compliant assistive listening support in a medium to large facility. It features Dual FM and Wi-Fi transmission, along with 24 FM R38 receivers.

The new transmitter uses WaveCAST Wi-Fi  technology, allowing users to listen either through their own smartphone or the a facility-provided FM receiver.

Large venues no longer need to choose between providing FM or Wi-Fi assistive listening systems, as this device is designed to deliver full audio performance.

Key Features and Specifications:

  • Wide-audience service with 24 PPA R37N FM receivers and WaveCAST compatibility
  • WaveCAST Android and iOS app can be installed for personal use
  • Ant 005’s RG 59 Coax cable type and a 22 ft cable length for an easy to connect cable
  • Large range of up to 1000 ft (304 m) with ANT 005 coaxial antenna
  • Rack mount of Standard 19” Rack, one EIA rack space high, 1/2 space wide
  • Long active antenna length of 80 in
  • Frequency Response of 200 Hz – 15 kHz, ±3dB
  • High-pass and Low-pass filters of Frequency control
  • Conducive CHG 3512 battery charger, a 12-unit, drop-in battery charger that charges a maximum of 24 AA size NiMH batteries
  • 1:1, 1.5:1 or 2:1 compression ratio
  • FCC, RoHS3, WEEE, Industry Canada approved
  • Audio Input of (1) 3-pin XLR, (1) 1/4″ (TRS) jack for balanced or unbalanced input
  • Ethernet that’s 0/100 Base-T IEEE 802.3 compliant
  • Ethernet Input of RJ-45 on back of unit supports CAT 5e cables maximum of 328 feet (100 meters)
  • Signal to Noise Ratio of 67 dB (typical) Transmited RF
  • Total Harmonic Distortion of less than 0.25% @ 1 kHz (RF output)
  • Line output of RCA jack (black), -10 dBV (.32 VRMS)
  • Headphone output of 1/4″ TRS stereo jack, mono signal

Ships With:

  • 1 FM T55 transmitter
  • 24 PPA R38N receivers
  • 6 NKL 001 neckloops
  • 2 CHG 3512 12-bay chargers
  • 24 EAR 022 surround earphones
  • 24 BAT 026-2 AA NiMH rechargeable batteries
  • 1 RPK 005 rack panel kit
  • 1 ANT 005 remote coaxial antenna
  • 1 IDP 008 ADA wall plaque