Williams AV FM 558 PRO FM+ Large-Area PRO Assistive Listening System Package with (4) R38 Receivers and Dante

Ensure every attendee hears every word with the Williams AV FM 558 PRO Large-Area PRO Assistive Listening System. Designed for auditoriums, conference centers and multi-use venues, this professional assistive listening package combines an FM+ transmitter with Dante networking to deliver reliable FM and IP audio distribution for monitoring, security integration and AV routing. The system ships with four R38 receivers, two neckloops and four EAR 022 surround earphones so staff can deploy ADA-compliant listening options immediately. With a frequency response up to 15 kHz (200 Hz minimum) the FM 558 PRO preserves speech clarity and natural sound for spoken-word applications. Networked Dante connectivity allows IT teams to monitor audio streams, route sources across the facility and interface with surveillance or paging systems. Built-in accessories — coax antenna, rack panel kit and chargers — speed installation and reduce onsite labor. For venues that require dependable accessibility and centralized audio monitoring, the Williams AV FM 558 PRO is a turnkey, scalable solution. Add receivers as your audience grows and bring inclusive, compliant audio to every event—contact your Williams AV reseller to specify and deploy.

• Deliver crystal-clear speech intelligibility across large venues so every attendee hears presentations, panels, and performances clearly.
• Dual-distribution FM+ transmitter with Dante and Wi‑Fi support enables flexible audio routing, networked monitoring, and integration with existing AV/security systems.
• Four R38 receivers and included neckloops/earphones provide immediate, ADA-compliant listening options for guests and patrons.
• Scalable solution supports an unlimited number of listeners via additional receivers or neckloops, ideal for conferences, houses of worship, and auditoriums.
• Rack kit, antennas and chargers simplify installation and daily operation—reducing setup time and lowering maintenance overhead.