About Us
The Professional's Source Since 1973
  • Help
  • 800.606.6969
Hello, Log InAccount & Orders
My Cart

Williams Sound FM+ Assistive Listening System

BH #WIFMT55 • MFR #FM T55
 2 reviews
Williams Sound FM+ Assistive Listening System
Key Features
  • Listen with FM Receiver or Smartphone
  • Smartphone/Headphones Discreet Listening
  • WaveCAST Wi-Fi Audio Server Technology
  • iOS/Android Compatible
The FM+ Assistive Listening System from Williams Sound integrates professional WaveCAST Wi-Fi audio server technology, allowing end users to listen with either an FM receiver or with their own smartphone (via the WaveCAST Audio Receiver app). Along with this flexibility comes exceptional audio quality, as the FM+ is built on a professional digital audio (DSP) platform.
Temporarily Out of Stock
$1,280.00
$107/mo. suggested payments for 12 Mos.
with the credit card.§ 
Ask Our Experts
800.606.6969

Williams Sound FM T55 Overview

  • 1Description
  • 2Rack Mounting
  • 3Compatible Antennas
  • 4RF Power
  • 5Sleep Mode
  • 6Audio Level Indicators

The FM+ Assistive Listening System from Williams Sound integrates professional WaveCAST Wi-Fi audio server technology, allowing end users to listen with either an FM receiver or with their own smartphone (via the WaveCAST Audio Receiver app). Along with this flexibility comes exceptional audio quality, as the FM+ is built on a professional digital audio (DSP) platform.

The 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 both the new iOS and Android WaveCAST Audio Receiver apps in addition to all of the current and legacy Williams Sound FM receivers operating on the 72-76 MHz bandwidth.

Most settings can be changed via the front panel interface, or over the hosted web interface. A remote programming guide is available upon request. The FM+ uses the WaveCAST app to provide an easy-to-use, intuitive user interface. You can easily select channels and volume level once your mobile device is connected to the Wi-Fi network. (The app does not work on FM broadcasts.)

Rack Mounting
Optional RPK 005 (single) or RPK 006 (double) rack mount kits supported
Compatible Antennas
ANT 005, ANT 021, ANT 024, ANT 025 (included), and ANT 029
RF Power
Full, medium, low, or off indicated by menu icon
Sleep Mode
RF sleep mode starts when audio is below -18 dB level and with no button pressed for selected duration
Audio Level Indicators
10-LED array that reads -18 to 9 dB at 3 dB intervals
UPC: 707976003850

Williams Sound FM T55 Specs

Display
3.1" / 7.9 cm OLED
Ethernet
1 x RJ45, 10/100 Base-T IEEE 802.3 Compliant
Operating Frequency
72.1 to 75.9 MHz (17 Wideband Channels)
Frequency Accuracy
±2 ppm Stability, 32 to 122°F / 0 to 50°C
Deviation
±75 kHz Maximum
Pre-Emphasis
75 μs
RF Field Strength
≤80 mV/m at 9.8' / 3 m
Transmission Range
Up to 1000' / 305 m with Optional ANT 005 Antenna on Rear Chassis Connector
RF Outputs
1 x #10-32 Stud Connector (Center)
1 x F-Connector (Rear)
RF Indicator
Green LED On Air Indicator
RF Time Out (Sleep Mode)
Duration: 30 Minutes / 4 Hours / Always On
Audio Processor
DSP Based
Compression: 1:1, 1.5:1, 2:1; High-Pass / Low-Pass Filter Frequency Control
Audio Frequency Response
31-16,000 Hz, ±3 dB (Re: 1 kHz, ±3 dB)
Signal-to-Noise Ratio
67 dB (Typical) Transmitted RF
Total Harmonic Distortion
<0.25% at 1 kHz (RF Output)
Common Mode Rejection
>57 dB at 1 kHz, Mic or Line
Audio Inputs
1 x Combination 3-Pin XLR / 1/4" (TRS) for Balanced/Unbalanced Line Level, or Balanced/Unbalanced Microphone with Selectable Phantom Power
Audio Input Gain
0 to -50 dB, in 1 dB Steps
Phantom Power
14.4 VDC Through 2.2 kOhms Resistors to Analog Combo Jack: Pin 2 and Pin 3 on XLR Jack, or Tip and Ring on 1/4" TRS Jack
Headphone Output
1/4" TRS Stereo Jack, Mono Signal, 14.85 mW at +9 dB, Maximum in 33 Ohms (0 to -40 dB Menu Adjustment in 2 dB Steps)
Line Output
RCA Jack, -10 dBV (.32 VRMS)
Output Impedance: 100 Ohms at 9 dB
Microphone
-55 dBV (1.7 mV RMS)
22 dBV (80 mV RMS)
+20 dBV (10.0 V RMS)
Line
-25 dBV (55 mV RMS)
+16 dBV (6.3 V RMS)
+20 dBV (10.0 V RMS)
Approvals
FCC, RoHS3, WEEE, Industry Canada
Power
Input: 100-240 VAC, 50/60 Hz
Output: 24 VDC, 750 mA, 18 W
Rack Size
19" Standard
One EIA Rack Space High
1/2 Space Wide
Operating Temperature
32 to 122°F / 0 to 50°C
Storage Temperature
-4 to 158°F / -20 to 70°C
Dimensions
8.47 x 8.27 x 1.73" / 21.5 x 21 x 4.4 cm
Weight
Transmitter: 3.2 lb / 1.45 kg
Packaging Info
Package Weight
5.045 lb
Box Dimensions (LxWxH)
13.1 x 10.5 x 3.5"

Williams Sound FM T55 Reviews

Works as expected

By Mark
Rated 5 out of 5
Date: 2021-02-04

This was to replace an old FM only unit. Setup was easy and everything worked on the first try. Both wireless (digital) and FM produce quality audio. It integrated with the rest of our system (for recording and streaming) easily.

Useless.

By Thomas
Rated 1 out of 5
Date: 2020-04-17

After fighting for hours all I can say is the “Plus” in FM plus is added frustration. The concept of the WaveCAST app is right on, but it can’t seem to provide a useful audio stream. It stutters. It cuts out. It looses connection. It’s just frustrating that I can have a Zoom conference from around the world with 12 people that is clearer, and more consistent. A single direction audio stream to a device over wifi should be a no brainer. But this does NOT work. Sad.

See any errors on this page? Let us know

YOUR RECENTLY VIEWED ITEMS

Does this transmitter come with an antenna?

Does this transmitter come with an antenna?
Asked by: Micah
Yes it does. the ANT 025 whip antenna is included.
Answered by: Mark
Date published: 2020-11-04

FM T55 will allow me to use up to 24 R37 units?

FM T55 will allow me to use up to 24 R37 units?
Asked by: Janine
The Williams Sound FM+ Assistive Listening System BH #WIFMT55 supports 45 users in unicast mode or 1500+ users in multicast mode.
Answered by: Mark
Date published: 2022-10-06
  • y_2023, m_9, d_27, h_3CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.35
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_2
  • loc_en_US, sid_1511712, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo