The groundbreaking WILLIAMS AV FM 558 Plus FM Plus Large-area is a Dual FM and Wi-Fi assistive listening system with 4 FM R38 receivers. Features coaxial cable and rack panel kit for professional installation. provides the industry-first choice of using traditional FM receivers or using personal electronic devices over Wi-Fi for hearing assistance. Along with this flexibility comes exceptional audio quality, as the FM + is built on a professional digital audio (DSP) platform.
The new FM + is designed to support those who want to use their own smartphones and headphones for a more discreet assistive listening experience. Simplicity is also available for those who want a more traditional assistive listening system with a dedicated FM receiver and headset. Venues no longer need to choose between providing FM or Wi-Fi assistive listening systems. FM + supports the iOS and Android WaveCAST Apps and the Wi-Fi Receiver-- in addition to all of the current and legacy Williams Sound FM receivers operating on the 72-76 MHz bandwidth.
Developed for hearing assistance in public venues, the FM + includes a complete audio processor optimized for the needs of hearing impaired people and are easily integrated with an existing sound system, or used with a microphone as a stand-alone system.