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Complete Williams Av Fm 557 12 Fm+ Large-area Dual Fm And Wi-fi Assistive Listening System Series [k98Z6nDN]

$139.99 $447.99 -69%

Part of the FM+ Assistive Listening Systems lineup from Williams AV, the FM 557-12 is a Large-area Dual FM and Wi-Fi® assistive listening system that includes (12) FM R37 receivers.This groundbreaking tech provides an industry-first choice of employi

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Part of the FM+ Assistive Listening Systems lineup from Williams AV, the FM 557-12 is a Large-area Dual FM and Wi-Fi® assistive listening system that includes (12) FM R37 receivers.

This groundbreaking tech provides an industry-first choice of employing traditional FM receivers or using personal electronic devices over Wi-Fi® for hearing assistance. Along with this versatility comes exceptional audio quality, as FM+ is assembled on a professional digital audio (DSP) platform. This technology is designed to support those who want to use their own smartphones and headphones for a more discreet assistive listening experience. Simplicity and flexibility is also available for those who prefer a more traditional assistive listening system with a dedicated FM receiver and headset. Now, venues willl no longer need to choose between providing FM or Wi-Fi assistive listening systems. FM+ supports the iOS and Android WaveCAST Apps as well as the Wi-Fi Receiver-- in addition to all of the current and legacy Williams AV FM receivers that operate on the 72-76 MHz bandwidth.

Williams Sound FM 557 12 Includes:

  • (1) FM T55 transmitter
  • (12) PPA R37N receivers
  • (12) EAR 022 surround earphones
  • (3) NKL 001 neckloops
  • (1) IDP 008 ADA wall plaque

Williams Sound FM 557 12 Features:

  • Professional audio inputs: ¼"/XLR, phantom power, line level output jack
  • Audio presets -- hearing assistance, music, voice and custom
  • 16-bit DAC provides 48 khz sample rate
  • 10-segment LED bar graph

Williams Sound FM 557 12 Specifications:

  • Note: specifications and further information can be found within the items located under the "Documentation" tab above.

What Our Customers Say

January 11, 2026

Absolutely no complaints!

The best money that I have ever spent in a while.

- Morfydd E..

January 11, 2026

Absolutely no complaints!

This is a fine tool that works perfectly so well.

- Seren C..

January 11, 2026

Absolutely no complaints!

A great tool that is incredibly and very useful.

- Rhiannon G..

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