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The PFM PRO and rechargeable PFM PRO RCH deliver superior audio directly to the ear, enhancing sound at home, work, or school – anywhere background noise or distance from the source makes listening difficult. Each system features 17 selectable channels on the 72-76 MHz band and has an operating range of up to 150 feet. A versatile 3.5mm jack allows for a variety of earphones and headphone options, and is compatible with neckloops and telecoil-equipped hearing aids (not included with system).
DISCLAIMER: FCC rules limit use of this equipment to auditory assistance.
NOTE: The PFM PRO and PFM PRO RCH systems are approved by the FCC for operation in U.S. markets. These systems cannot be used in all countries. Check with your government´s radio regulations for 72-76 MHz operation.
NiMH, 1.2 Volt, 1500 mAh
|Style||Single, in-ear, isolation earphone|
|Driver Size||10 mm|
|Freq. Response||20 - 20kHz|
|Max Power Input||5 mW|
|Sensitivity||104 dB @ 1kHz|
|Replacement Silicone Tip||EAR 043 (0ne pair)|
Mono, folding headphone
20 - 20kHz
Max Power Input
110 dB @ 1kHz
HED 023 (one pair)
20 Hz – 18 kHz
-56 ± 3 dB
3.5 mm, right-angle
|Dimensions:||4.1" x 2.85" x 1.38" (104 x 72 x 35mm)|
|Weight:||4.6oz (130g) with batteries. 2.6oz (73g) without batteries|
|Battery Type:||(2) AA Alkaline or 2 x AA NiMH|
|Battery Life:||Two (2) AA non-rechargeable alkaline batteries (BAT 001), approx. 50 hrs|
|(2) AA rechargeable NiMH batteries (BAT 026), 1500 mAh, approx. 32 hrs|
|Current Consumption:||52mA nominal|
|Temperature Range:||– 0 to 50C|
|Channels||17, accessed via seek button in battery compartment|
|Operating Freq.:||72.1, 72.2, 72.3, 72.4, 72.5, 72.6, 72.7, 72.8, 72.9, 74.7, 75.3, 75.4, 75.5, 75.6, 75.7, 75.8, 75.9 MHz*|
|Intermediate Freq.:||75 kHz|
|FM Deviation:||75 kHz|
|LED Indicator:||Power: Green; Low Battery: Flashes Green|
|AFC Range:||± 120 kHz|
|Sensitivity:||2 µV at 12 dB Sinad with squelch defeated|
|Input Overload:||100 mV|
|Frequency Response:||200 – 15 kHz|
|Modulation:||FM, +/- 75 kHz peak deviation|
|Signal-to-Noise Ratio:||65 dB min @ 100 uV|
|Receive Antenna:||Integral with earphone/headphone cord|
|Audio Output:||35 mW max, peak into 16 ohms|
|Output Connector:||3.5 mm stereo/mono phone jack|
|Earphone:||Earbud-type with foam cushion, 3.5 mm plug, 32 Ω|
|Auto Shut-off||Enters sleep mode after approx 6 mins of no RF signal|
|Approvals:||FCC, Industry Canada, RoHS, WEEE|
|Warranty:||Lifetime PLUS Limited Warranty, 90 Days on most accessories.|
4.1” L x 2.8” W x 1.1” D (104 mm x 71 mm x 28 mm)
2.6 oz (74 g), no batteries
Shatter-resistant PC/ABS plastic with textured scratch-resistant aluminum faceplate
Battery Type options:
Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001-2), 75 mA nominal current drain, up to 30 hours battery life
Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026-2), 75 mA nominal current drain, up to 20 hours battery life per charge, recharges in 14–16 hours, uses CHG 3502 or CHG 3512 Charger
Selectable, 17 channels, 72.1 – 75.9 MHz*. Switchable 8 or 17 Channel Mode. (8-channel mode setting corresponds with PPA R35-8 receiver channels)
± .005%, frequency synthesized, crystal reference, PLL
Wide-band FM, 75 kHz peak, 75 µS pre-emphasis
80 mV/m at 3 m (max. allowed by FCC rules)
180 Hz to 13 kHz, ± 3 dB at 1% max. THD
65 dB (typical) transmitted
Integral with microphone cord
Electret type, 3.5 mm mono plug
OLED for status and menu information.
Status: Ch/Freq, Mic Audio Level, Auxiliary Input Audio Level, Battery Status, Mic Mute, Channel Lock, Dual-Preset mode.
Menu: Ch/Freq display mode select, Volume, Aux Input, Compression,
17 or 8-channel mode, screen time out, screen brightness, restore default settings
Momentary push button: push and hold 3 seconds for power On/Off, push and release for microphone mute On/Off. “Up”, “Down” and “Menu” buttons for accessing and changing transmitter settings. Battery type switch (Alkaline or NiMH) located behind the battery compartment door
Power LED - Green, flashes when battery is low
3.5 mm mono jack with electret mic bias, adjustable gain with
25 dB range
2.5 mm stereo jack, adjustable gain with 60 dB range
1:1 (off) or 2:1 (on) selectable in menu
PFM R31, PFM R32, PFM R33, PFM R36, PPA R35, PPA R37, PPA R35-8, PPA R1600,
FCC, Industry Canada, RoHS, WEEE
Lifetime PLUS Limited Warranty, 90 Days on most accessories.
The PPA T46 is FCC Part 15 compliant.
Effective July 11, 2016, the FCC has mandated tighter emissions limits on auditory assistance transmitters (72-76 MHz) manufactured or imported after this date to help avoid interference with and/or degradation of other airborne signals (All products manufactured prior to July 11, 2016, are compliant). Williams Sound FM transmitters – PPA T46, PPA T27 and PPA T45 (all models) – all have received a Grant of Certification from the FCC and are fully compliant/approved under this new mandate.
All Williams Sound headphones and earphones are compatible with this product.
|PFM PRO/PFM PRO RCH User Manual||Manuals||English|
|PPA R37 Manual||Manuals||English|
|PPA T46 User Manual English||Manuals||English|
|PFM PRO/PFM PRO RCH Specifications||Specifications||English|
|PPA T46 User Manual Spanish||Manuals||Español|
|PPA T46 User Manual Portuguese (Brazil)||Manuals||Portuguese|
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