Williams AV FM+ 557-24 Large Area Assistive Listening System for both FM and Wi-Fi Transmission (24 Receivers)

Williams AV FM+ 557-24 ADA Compliant Assistive Listening System

The FM+ 557-24 delivers ADA-compliant assistive listening for large-sized venues, providing crystal-clear, reliable audio that ensures accessibility for every guest.

At the core of the system is the FM T55C transmitter, which features multiple digital audio inputs, an intuitive OLED display, and full network control for easy setup and operation. It simultaneously broadcasts audio over FM (72–76 MHz) and Wi-Fi, giving users the flexibility to listen via traditional R37 receivers or their own smartphones using a dedicated app.

The 24 included R37 receivers offer simple channel selection through a seek button and access to 17 pre-set wideband channels (72.1–75.9 MHz), ensuring consistent and high-quality audio performance. Also included are 24 surround earphones for comfortable, over-ear listening and an ADA wall plaque to signal assistive listening availability. Fully expandable to support more users, FM+ 557-24 is a future-ready solution for enhancing accessibility in any venue.

• FM+ T55C transmitter with dual FM and Wi-Fi audio
• OLED display with easy-to-use menu navigation
• Network control and integration with third-party systems
• Includes 24 R37 receivers with synthesized digital audio
• 24 surround earphones rest outside the ear for comfort
• Ideal for mid to large sized venues seeking ADA compliance
• Clear, reliable audio for assistive listening applications

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
• (1) IDP 008 ADA Wall Plaque