Williams Sound Personal FM Plus Assistive Listening System - 557 PRO

$2,030.00 List Price:$2,100.00
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Williams Sound Personal FM Plus Assistive Listening System - 557 PRO


The FM Plus 557 assisted listening system – now with integrated Wi-Fi – has replaced the existing 457 systems for public venues. The FM 557 Plus offers both FM and Wi-Fi transmission from the same box for nearly the same cost as traditional FM systems.


  • This system features the cutting edge PPA TT55 transmitter (replacing the T45 FM transmitter) with multiple digital audio input options and an OLED display with easy-to manage navigation, and network control features.
  • This complete turnkey solution includes 4 PPA R37N receivers, each featuring seekbutton channel selection with access to 17 selectable wideband frequencies between 72.1-75.9MHz. 
  • The bundle includes a coax cable and rack panel kit for professional installation.
  • The system is expendable, accommodating any number of listeners. 
  • This system complies with 2010 ADA guidelines for hearing assistance


  • Battery Life: Two (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs
  • (2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs
  • Audio Output:35 mW max, peak into 16 ohms
  • Output Connector:3.5 mm stereo/mono phone jack
  • Operating Frequencies: 72.1-75.9 MHz , 17 wideband channels (selectable)
  • Transmission Range: Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector

System Includes:


  • (1) FM T55 transmitter
  • (4) PPA R37N receivers
  • (4) EAR 022 surround earphones
  • (2) NKL 001 neckloops
  • (2) BAT KT6 two-bay chargers and rechargeable batteries
  • (1) ANT 005 remote coaxial antenna
  • (1) IDP 008 ADA wall plaque
  • (1) RPK 005 rack panel kit



Warranty Information

Lifetime PLUS Limited Warranty.

Manufacturer: Williams Sound 



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