Williams AV FM 557 PRO FM+ Large-Area Assistive Listening System with Rack Panel Kit for both FM and Wi-Fi Transmission 4 Receivers and Dante

Provide reliable, accessible audio to every listener with the Williams AV FM 557 PRO assistive listening system — a professional-grade solution built for large venues and mission-critical environments. This pro assistive listening device delivers dual FM and Wi‑Fi transmission for flexible coverage, and includes Dante network input for seamless integration with existing audio, security and monitoring infrastructure. The kit ships ready for installation with a rack panel, ANT 005 coaxial antenna, FM T55 D transmitter and four PPA R37N receivers, plus earphones, neckloops and two-bay chargers with rechargeable AA batteries. Installers and AV managers benefit from the included rack kit and coax cable for tidy, secure mounting and simplified maintenance. Because the system is expandable and network-ready, it supports growth in audience size and connects cleanly with surveillance, paging and monitoring systems to keep operations coordinated. Ideal for theaters, houses of worship, campuses and transportation hubs, the FM 557 PRO reduces complaints, improves ADA compliance, and streamlines onsite management. Configure your system for immediate use or contact our sales team to design a customized deployment.

• Seamless large-area coverage with dual FM and Wi‑Fi transmission, ensuring clear audio for listeners across auditoriums, houses of worship, and conference centers
• Dante network input and included coaxial antenna plus rack panel kit enable professional installation and easy integration with AV, security, and monitoring systems
• Turnkey package includes 4 R37 receivers, earphones, neckloops and two-bay chargers with rechargeable AA batteries for immediate deployment and low operating cost
• Scales to any audience size — expandable system design supports additional receivers and accessories as facility needs grow
• ADA-compliant signage and rack-ready components reduce setup time and simplify ongoing management for facility managers and AV integrators