Williams AV FM T55 Large-Area Dual FM and Wi-Fi Base Transmitter with Network Control

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FM T55
3.20 LBS
Calculated at Checkout
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Williams AV FM T55 Large-Area Dual FM and Wi-Fi Base Transmitter with Network Control, 3.12" High Resolution OLED Display, 72.1-75.9MHz Operating Frequencies, 17 Wideband Channels

The new FM Plus integrates professional WaveCAST Wi-Fi audio server technology into a Williams Sound FM assistive listening system. End users can now listen with either an FM receiver or with their own smartphone (via the WaveCAST Listening App). Along with this flexibility comes exceptional audio quality, as the FM Plus is built on a professional digital audio (DSP) platform. The new FM Plus is designed to support those who want to use their own smartphones and headphones for a more discreet assistive listening experience.

This product replaces the discontinued models PPA T45 and PPA T45.



  • User Interface: 3.12" High Resolution OLED display with selections via buttons
  • Operating Frequencies: 72.1-75.9MHz , 17 wideband channels (selectable)
  • Frequency Accuracy: ±2ppm stability
  • Deviation: ±75kHz maximum
  • Pre-Emphasis: 75 microsec
  • RF Field Strength: Does not exceed 80 mV/m at 3 m
  • RF Power: Full, Medium, Low or OFF indiacted by menu icon
  • Audio Processor Functions: DSP based; Compression: 1:1, 1.5:1 or 2:1; High-pass and Low-pass Filter Frequency control
  • Frequency Response: 31-16000Hz, ±3 dB (re: 1 kHz, ±3 dB) ("Music" Audio Preset)
  • Signal-to-Noise Ratio: 67dB Transmited RF
  • Total Harmonic Distortion: Less than 0.25% @ 1kHz (RF output)
  • Common Mode Rejection: Greater than 57dB @ 1kHz, Mic or Line
  • Rack Mount: Standard 19" Rack, one EIA rack space high, 1/2 space wide
  • Ethernet: RJ-45 on back of unit supports CAT 5e cable lengths up to 328 feet (100 meters); 10/100 Base-T IEEE 802.3 compliant, unique MAC address
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