Williams AV FM+ 557-24 PRO Assistive Listening System with Rack Panel Kit for Dual FM and Wi-Fi Transmission (24 Receivers)

Williams AV FM+ 557-24 PRO ADA Compliant Assistive Listening System with Rack Panel Kit

The FM+ 557-24 PRO System is a comprehensive assistive listening solution tailored for large-sized venues, combining advanced technology with professional-grade installation components.

At the heart of the system is the FM+ C transmitter, delivering simultaneous real-time audio over FM and Wi-Fi. This gives listeners the flexibility to tune in using the WaveCAST Receiver app on their smartphone or tablet, or via the included R37 receivers for crystal-clear, reliable performance.

To ensure the system is always ready, it comes equipped with a 12-bay charger and rechargeable batteries. An ADA wall plaque is also included, helping venues clearly communicate the availability of assistive listening services.

For streamlined integration, the system features a coax antenna and rack panel kit—ideal for professional installations requiring dependable, high-performance audio distribution.

• For both FM and Wi-Fi Transmission
• Turnkey assistive listening system
• 1 FM T55C transmitter
• 24 PPA R37N bodypack receivers
• 24 EAR 022 surround earphones
• 6 NKL 001 neckloops
• 2 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
• (24) PPA R37N Receivers
• (24) EAR 022 Surround Earphones
• (6) NKL 001 Neckloops
• (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