FM 558-24 PRO – FM Plus Personal Listening System
$ 9780
The FM 558-24 PRO personal listening system from Williams Sound contains everything you need to get up and running with ADA-compliant assistive listening support in a medium to large facility. It features Dual FM and Wi-Fi transmission, along with 24 FM R38 receivers.
The new transmitter uses WaveCAST Wi-Fi technology, allowing users to listen either through their smartphone or the facility-provided FM receiver.
Large venues no longer need to choose between providing FM or Wi-Fi assistive listening systems, as this device is designed to deliver full audio performance.
The FM 558-24 PRO The PRO system package is a complete turnkey solution. The system features a state-of-the-art PPA T55 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 system is scalable and provides space for any number of listeners. This system meets the 2010 ADA Hearing Assistance Guidelines and costs about the same as traditional FM systems.
Ships With:
- 1 FM T55 transmitter
- 24 PPA R38N receivers
- 6 NKL 001 neck loops
- 2 CHG 3512 12-bay chargers
- 24 EAR 022 surround earphones
- 24 BAT 026-2 AA NiMH rechargeable batteries
- 1 RPK 005 rack panel kit
- 1 ANT 005 remote coaxial antenna
- 1 IDP 008 ADA wall plaque
NOTE: The FM + does not provide a WiFi network. It will need to connect to the location’s established Wi-Fi Network before the FM + can be used.
- Wide-audience service with 24 PPA R37N FM receivers and WaveCAST compatibility
- WaveCAST Android and iOS apps can be installed for personal use
- Ant 005’s RG 59 Coax cable type and a 22 ft cable length for an easy-to-connect cable
- Large range of up to 1000 ft (304 m) with ANT 005 coaxial antenna
- Rackmount of Standard 19” Rack, one EIA rack space high, 1/2 space wide
- Long active antenna length of 80 in
- Frequency Response of 200 Hz – 15 kHz, ±3dB
- High-pass and Low-pass filters of Frequency control
- Conducive CHG 3512 battery charger, a 12-unit, drop-in battery charger that charges a maximum of 24 AA size NiMH batteries
- 1:1, 1.5:1 or 2:1 compression ratio
- FCC, RoHS3, WEEE, Industry Canada approved
- Audio Input of (1) 3-pin XLR, (1) 1/4″ (TRS) jack for balanced or unbalanced input
- Ethernet that’s 0/100 Base-T IEEE 802.3 compliant
- The Ethernet Input of RJ-45 on the back of the unit supports CAT 5e cables maximum of 328 feet (100 meters)
- Signal to Noise Ratio of 67 dB (typical) Transmitted RF
- Total Harmonic Distortion of less than 0.25% @ 1 kHz (RF output)
- Line output of RCA jack (black), -10 dBV (.32 VRMS)
- Headphone output of 1/4″ TRS stereo jack, mono signal
Related Products
The FM 557 PRO FM Plus Hybrid Wavecast/FM System is versatile assistive listening solution that offers both FM and Wi-Fi transmission from the same transmitter. Listeners can use their own cell phone via the Wavecast app or listen with the included PPA R37N FM receivers. With its 3.5mm mono/stereo jack, the R37 allows your audience to use their headsets if they choose while also being compatible with neck-loop/telecoil-based hearing aids. Complies with 2010 ADA hearing assistance guidelines.
Looking for a Wi-Fi assistive listening transmitter for pro-audio applications?
Then the WF T5C – Wavecast Assistive Listening System is a great fit. It’s constructed on a hardware-based DSP audio system architecture making audio streaming have the best quality experience.
Hearing loss won’t be a problem, as this device provides the highest quality of hearing assistance, high-fidelity playback for optimized music, and a voice that can be edited for maximum speech intelligibility.
Looking to combine the wide coverage of FM with the convenience of a bring-your-own device? The FM T55C assistive listening system transmitter from Williams Sound is your best (and only) choice! This transmitter is the first on the market to combine FM and Wi-Fi so your listeners can tune in either on your facility’s FM receivers OR their smartphones.
CHG 3512 12 Bay Drop-in Charger for Williams AV body-pack style transmitters and receivers.









