Williams AV FM 558 PRO FM+ Large-Area Dual FM and Wi-Fi Assistive Listening System with (4) R38 receivers

Designed to deliver dependable large-area assistive listening, the Williams AV FM 558 PRO FM+ system provides clear audio access and compliance for public venues and secure facilities. As a professional assistive listening system, it blends dual FM and Wi‑Fi support with a powerful T55 transmitter and four PPA R38N receivers to maintain consistent coverage across auditoriums, transit centers, courtrooms and monitoring/control rooms. The package ships ready for installation with an ANT 005 remote coaxial antenna, RPK 005 rack panel kit, EAR 022 earphones and NKL 001 neckloops—reducing setup time and integration effort for AV and security teams. AC/DC power capability plus BAT KT6 two-bay chargers and rechargeable batteries ensure continuous operation during events and critical monitoring periods. Environmentally conscious (RoHS/WEEE) construction and robust ABS housing deliver long-term reliability in demanding commercial and surveillance environments. Ideal for organizations needing ADA-compliant listening solutions that integrate with existing security, surveillance and audio systems—contact our sales team to configure the FM 558 PRO for your venue or order today.

• Turnkey, large-area assistive listening that improves accessibility and audience engagement across auditoriums, transit hubs and courtrooms
• Dual FM and Wi‑Fi reception for broad device compatibility and reliable signal coverage with included FM T55 transmitter
• Complete kit with four PPA R38N receivers, EAR 022 earphones, NKL 001 neckloops and ANT 005 remote coaxial antenna for immediate deployment
• Professional installation components (RPK 005 rack panel kit and coaxial feed) simplify rack mounting and integration with existing AV/security infrastructure
• Continuous operation with AC/DC power support, BAT KT6 two-bay chargers and rechargeable batteries to minimize downtime
• ADA-friendly solution that supports monitoring and security workflows while meeting accessibility requirements