Williams Sound Wide Area PA FM457 PRO Assistive Listening System w/ 4 Receivers

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The FM457 PRO is ideal for large venues where superior coverage is essential. 
Features three powerful microprocessors for high-quality audio and RF performance. Includes a coaxial cable and rack panel kit for professional installation. Expandable to accommodate any number of listeners. Complies with 2010 ADA Guidelines.


FM457PRO features the cutting-edge PPA T45 transmitter with multiple digital audio input options with an OLED high-resolution screen and an easy to manage menu navigation. Includes four R37 receivers with access to 17 pre-set wideband frequencies between 72-76 MHz. Simply select among voice, music or hearing assistance in the preset menu, and the transmitter quickly configures itself


  • Operating range up to 1000 feet
  • Optional 17- channel receiver (WS-PPAR38N) available for multi-channel applications
  • ADA compliant and FCC approved for USA, but not for all countries
  • Lifetime PLUS Limited Warranty on transmitters and receivers, one year warranty on neckloops and ninety day warranty on accessories


  • PPA T45 stationary transmitter, antenna, power cord & supply
  • 4 R37N receivers with AA alkaline batteries
  • 2 Drop-in chargers with AA rechargeable batteries
  • 4 Earphones
  • 2 Neckloops
  • Coaxial antenna
  • Rack panel kit
  • Audio cable
  • ADA wall plaque