Williams AV FM+ 557 PRO Assistive Listening System with Rack Panel Kit for Dual FM and Wi-Fi Transmission (4 Receivers)

Williams AV FM+ 557 PRO ADA Compliant Assistive Listening System with Rack Panel Kitt

The FM+ 557 PRO system is a complete, professional-grade assistive listening solution designed for seamless installation and broad accessibility. It includes a dual FM and Wi-Fi FM+ T55C transmitter, four R37 receivers, a coaxial antenna cable, and a rack panel kit for streamlined integration into any AV setup.

The transmitter features advanced DSP audio processing and supports third-party control via Telnet over Ethernet, enabling easy remote management. The R37 receivers offer user-friendly operation with 17 pre-set wideband FM channels (72.1–75.9 MHz), allowing an unlimited number of users to tune in. The system also comes with surround earphones, neckloops, a drop-in charging station, and an ADA wall plaque—making it easy for venues to promote accessible listening for all guests.

• For both FM and Wi-Fi Transmission
• Turnkey assistive listening system
• One FM T55 transmitter
• Four PPA R37N bodypack receivers
• Four EAR 022 surround earphones
• Two NKL 001 neckloops
• Two-bay charger kits with batteries
• Includes all necessary accessories
• High-quality audio and RF performance
• Control and monitoring over ethernet
• Multiple digital audio inputs

FM+ User Manual

FM 557 Data Sheet

FM+ Quick Start Guide

FM T55C Data Sheet

FM T55C Manual

PPA R37N Data Sheet

• (1) FM T55C Transmitter
• (4) PPA R37N Receivers
• (4) EAR 022 Surround Earphones
• (2) NKL 001 Neckloops
• (2) BAT KT6 Two-Bay Chargers and Rechargeable Batteries
• (1) ANT 005 Remote Coaxial Antenna
• (1) IDP 008 ADA Wall Plaque
• (1) RPK 005 Rack Panel Kit