Williams AV PFM PRO – Personal FM Listening System

Product Overview

The Williams AV PFM PRO is a complete personal FM listening system that delivers a talker's voice directly to the listener's ear, cutting through background noise and distance at work, school, or home. The kit pairs a PPA T46 bodypack transmitter with a PPA R37 receiver, lavalier microphone, earphone, headphone, audio cable, batteries, and a carrying case — a one-to-one or small-group hearing assistance solution that runs on standard AA alkaline batteries.

Product Description

The T46 transmitter broadcasts on 17 selectable channels across the 72-76 MHz hearing assistance band with an operating range of up to 150 feet. The talker wears the included MIC 090 lavalier microphone, while the OLED interface provides menu access to channel selection, mic and aux gain, selectable 2:1 compression, and mic mute — features that keep speech intelligible in classrooms, training rooms, and meetings. A 2.5 mm auxiliary input with the included WCA 087 cable lets the transmitter broadcast any line-level audio source alongside the voice signal.

The listener wears the R37 receiver and chooses between the included EAR 041 single in-ear earphone and HED 021 folding headphone; the receiver's 3.5 mm jack is also neckloop compatible for telecoil-equipped hearing aids (neckloop not included). The receiver runs up to 50 hours and the transmitter up to 30 hours on AA alkaline batteries, and both units can later move to NiMH rechargeables with Williams Sound drop-in chargers. Everything stows in the included CCS 043 carry case for transport between rooms or sites.

For a kit with rechargeable batteries and a drop-in charger included, see the PFM PRO RCH rechargeable system. Additional receivers, neckloops, and microphones are available in the Williams AV collection at Creation Networks.

Key Features

• Complete One-to-One FM Kit — Transmitter, receiver, lavalier mic, earphone, headphone, aux cable, batteries, and carry case ship together, ready for immediate use.
• 17 Selectable Channels — The T46 transmits on 17 digitally synthesized channels in the 72-76 MHz band, allowing multiple systems to operate in adjacent rooms.
• 150-Foot Operating Range — Coverage up to 150 feet (46 m) suits classrooms, meeting rooms, tours, and training environments.
• Auxiliary Audio Input — The 2.5 mm aux input broadcasts any line-level audio source, such as a media player, alongside the microphone signal.
• Compression and Mute Control — Selectable 2:1 compression evens out talker levels, and one-touch mic mute supports private sidebar conversations.
• Two Listening Options Included — The kit supplies both an EAR 041 in-ear earphone and a HED 021 folding headphone so listeners choose their comfort.
• Telecoil Compatible — The R37 receiver's 3.5 mm jack drives an optional neckloop for telecoil-equipped hearing aids.
• Group Expandable — Additional R37 receivers tune to the same channel, scaling the system from one listener to a group.

Typical Applications

• Training room
• Conference room
• Huddle room
• Commercial meeting space
• Government space

Technical Specifications

Frequently Asked Questions

Who is the PFM PRO designed for?

It serves anyone who needs a direct audio path from talker to listener — students with hearing difficulty in classrooms, employees in training sessions, meeting participants, and one-on-one situations where distance or background noise degrades intelligibility.

Can more than one listener use the system?

Yes. Any number of additional Williams Sound 72-76 MHz receivers, such as the PPA R37, can tune to the transmitter's channel to serve a group.

Does it work with hearing aids?

The R37 receiver drives an optional neckloop through its 3.5 mm jack, coupling inductively to telecoil-equipped hearing aids and cochlear implant processors. Neckloops are sold separately.

What is the difference between the PFM PRO and the PFM PRO RCH?

The PFM PRO runs on AA alkaline batteries; the PFM PRO RCH adds NiMH rechargeable batteries and a CHG 3502 dual drop-in charger for a rechargeable workflow.

Can I broadcast audio from a media source?

Yes. The T46's 2.5 mm auxiliary input, used with the included WCA 087 cable, broadcasts any line-level source with independently adjustable gain.

What warranty applies?

The transmitter and receiver carry the Williams AV Lifetime PLUS Limited Warranty, with 90 days on most accessories. Creation Networks supports the full Williams AV assistive listening line.