Williams AV FM 557-12 FM+ Large-Area Dual FM and Wi-Fi Assistive Listening System with (12) R37 Receivers

Provide consistent, accessible audio across large venues with the Williams AV FM 557-12 FM+ Large-Area Dual FM and Wi‑Fi Assistive Listening System. This professional assistive listening solution is built to support hearing assistance programs, delivering up to 997 ft of reliable coverage and operating across the 72.10–75.90 MHz FM band while also offering Wi‑Fi transmission for modern networked deployments. The FM 557-12 package ships as a complete turnkey Pro Assistive Listening Devices bundle with 12 PPA R37 receivers, surround earphones, neckloops, ADA wall plaque, and professional installation accessories—minimizing setup time and administrative overhead for facilities teams.

Engineered for real-world use, the system accepts XLR inputs for mic and mixer integration, supports AA alkaline or NiMH batteries (32–50 hour runtime), and meets ADA guidelines for hearing assistance. Its dual-mode operation and robust range make it ideal for houses of worship, conference centers, courtrooms, and security or monitoring environments where clear, compliant audio distribution is essential. Contact sales to specify a custom rack installation or add the FM 557-12 to your next project to improve accessibility and audio monitoring today.

• Delivers clear, large-area assistive listening across venues with up to 997 ft operating range for reliable audience coverage
• Dual FM and Wi‑Fi transmission for flexible deployment and redundancy in busy RF environments
• Turnkey kit includes 12 R37 receivers, earphones, neckloops and ADA signage—ready for immediate guest use
• Long-running AA battery support (up to 32–50 hours) and XLR input for seamless integration with sound systems
• ADA-compliant design and professional install options (rack kit, coax) make it ideal for theaters, courtrooms, houses of worship and security/monitoring centers