FM ADA Compliance Kit - Rechargeable

Product Highlights

  • Simple set-up and operation
  • PPA T46 transmitter
  • 150’ operating range
  • 100 hours receiver battery life
  • Lifetime PLUS Limited Warranty (90 days on accessories)
  • Meets new 2010 ADA accessibility guidelines
  • Made in USA


Same as FM ADA KIT 37, plus charger. Provides everything you need to accommodate individuals for hearing accessibility in a small-group settings such as libraries, conference rooms and information desks. This portable, easy-to-use FM system operates at 72-76 MHz on one of 17 selectable channels. This single kit satisfies ADA requirements for multiple-room facilities.


NOTE: The FM ADA Compliance Kit is approved by the FCC for operation in U.S. markets. The system cannot be used in all countries. Check with your government´s radio regulations for 72-76 MHz operation.


Disclaimer: FCC rules limit use of this equipment to auditory assistance.



System Includes

(1) PPA T46 transmitter
(4) PPA R37 receivers
(4) HED 027 headphones
(1) MIC 090 lapel microphone
(1) MIC 049 desktop conference mic
(1) CCS 029 system carry case
(2) NKL 001 neckloops
(1) BAT KT6 charger kit
(5) BAT 026-2 AA rechargeable batteries
(1) IDP 008 ADA wall plaque
Ada fm kit 37 rch


  • Simple set-up and operation
  • PPA T46 transmitter
  • 150’ operating range
  • 100 hours receiver battery life
  • Lifetime PLUS Limited Warranty (90 days on accessories)
  • Meets new 2010 ADA accessibility guidelines
  • Made in USA



Jury Rooms
Small Meeting Rooms
Council Chambers
Parent/Teacher Conferences
Small Conference Rooms
Consultation Rooms
Information Desks


HED 027


Heavy-duty, folding, mono headphones


3.5mm mono



Driver Size

40 mm

Nominal Impedance


Freq. Response

20 - 20kHz



Max Power Input

100 mW


96 dB @ 1kHz

Replacement Pads

EAR 035 (one pair)

IDP 008

10-3/8" (L) x 6-¼" (W) x 1/8" (H)

MIC 049

Phantom Power

1.2 - 10 VDC


1.5 kΩ

Operating Voltage

1.2 - 10 VDC

Freq. Response

100 Hz - 8 kHz

Signal-to-Noise Ratio

>60 dB

Pick-Up Pattern





-38 dB ± 3 dB






0.08 lbs


3.5 mm mono

Cord Length





90 days

MIC 090



Pick-Up Pattern


Phantom Powered



1.5 kΩ

Frequency Response

20 Hz – 18 kHz

Dynamic Range

79 dB


-56 ± 3 dB

Signal-to-Noise Ratio

63 dB


3.5 mm, right-angle

Cord Length





0.05 lbs

Replacement Windscreen

WND 006

Replacement Clip

CLP 090




90 days

PPA R37 Architectural and Engineering Specifications

  • The PPA R37 receiver shall be encased in black, PC/ABS impact-resistant plastic with a hinged battery door. The receiver shall be a body-pack style and include a detachable belt-clip for hands-free operation. The receiver shall have a 3.5mm stereo/mono jack to accommodate stereo or mono low impedance earphones, headphones and neckloops. The receiver shall have a combination volume control with power on/off rotator dial. It shall have a green LED indicating battery and system status codes. The R37 shall have access to 17 preset wideband channels between 72-76MHz. Channel selection shall be made by pushing the seek button inside the battery compartment. The receiver shall have channel-lock capability.
  • The receiver shall have a slide switch inside the battery compartment to select disposable Alkaline or NiMH rechargeable battery operation. It shall have charger contacts on the bottom of the receiver for use with Williams Sound drop-in chargers CHG 3512 and CHG 3502. The R37 shall operate up to 50 hours with two disposable AA Alkaline batteries and up to 32 hours with two AA NiMH rechargeable batteries (BAT 026).
  • The receiver shall provide a maximum out of 35mW at 16ø with an earbud type earphone. The systems audio frequency response shall be 200Hz to 15kHz ± 3dB and the signal to noise ratio shall be 65dB min. The receiver sensitivity shall be 2μV or better at 12dB Sinad with squelch defeated. The R37 shall accept up to ±75kHz FM deviation and have a 75 μ s de-emphasis time constant.
  • The R37 shall have FCC, Industry Canada approvals and be compliant with RoHS and WEEE regulations. The receiver shall be covered by a Lifetime PLUS Limited Warranty, excluding earphones, headphones and batteries.
  • This receiver model shall be the Williams Sound model PPA R37.


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
Channels17, 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
De-Emphasis:75 µS
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-offEnters 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.

PPA T46 Architectural and Engineering Specifications

  • The transmitter shall be a wide-band body-pack transmitter and shall operate on 17 selectable frequencies between 72MHz and 76MHz.  It shall operate for up to 30 hrs with two AA Alkaline batteries and be housed in a black plastic enclosure with an aluminum faceplate. It shall have battery recharge ability utilizing Williams Sound drop-in chargers.
  • The transmitter shall have a 3.5 mm microphone jack and a 2.5 mm auxiliary audio input jack.  The microphone cord will serve as the transmitting antenna.  The Transmitter shall have three buttons on the front to access channel select, master and aux gain, compression on/off, channel lock and screen adjustments.  There shall be an OLED screen on the front of the Transmitter displaying current operating status and menu information.  
  • The transmitter shall have the ability to operate in dual channel mode whereby the user can switch between two different transmitting channel presets, each with its own set-up parameters (channel, master volume, aux volume). 
  • There shall be a power switch which also serves as a microphone mute control on the top bezel of the transmitter.
  • The transmitter shall have wide band FM modulation at 75 KHz peak with a frequency response of 180 Hz to 13 KHz.
  • The transmitter shall be covered under a limited lifetime parts and labor warranty. 
  • The transmitter shall comply with FCC Part 15.
  • This transmitter shall be the Williams Sound model PPA T46.



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



Enclosure Material:

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

Operating Frequencies:

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

RF Output:

80 mV/m at 3 m (max. allowed by FCC rules)

Frequency Response:

180 Hz to 13 kHz, ± 3 dB at 1% max. THD

Signal-to-Noise Ratio: 

65 dB (typical) transmitted

Transmit Antenna:

Integral with microphone cord


Electret type, 3.5 mm mono plug

External Display:

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

External Controls:

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

External Indicators:

Power LED - Green, flashes when battery is low

Mic Input:

3.5 mm mono jack with electret mic bias, adjustable gain with 

25 dB range

Aux Input:

2.5 mm stereo jack, adjustable gain with 60 dB range

Audio Compression:

1:1 (off) or 2:1 (on) selectable in menu

Compatible Receivers:

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.

Accessories for FM ADA Compliance Kit - Rechargeable

BAT 026-2 Two AA NiMH rechargeable batteries

BAT KT6 Charger kit for body-packs, 2-bay

CCS 029 Small accessory briefcase

CCS 030 Large briefcase with pluck foam and dividers

EAR 008 Over-ear, hook earphone

EAR 013 Single mono earbud

EAR 013 T Single Mini Earphone w/ Eartip

EAR 014 Dual Mini Earbuds

EAR 014 T Dual mini earbud w/ Eartips

EAR 022 Surround Earphone

EAR 041 Single, in-ear, isolation earphone

EAR 042 Dual, in-ear, isolation earphones

HED 021 Folding Headphones (Mono)

HED 024 Folding Headphones (Stereo)

HED 026 Rear-wear, mono headphones

HED 027 Heavy-duty, folding, mono headphones

HED 040 Hearing-protector, dual ear muff headphones

MIC 020 Lightweight rear wear mic

MIC 044 Noise-Cancelling Mic

MIC 044 2P Noise-Cancelling 2-plug Headset Mic

MIC 045 Dual-ear noise-cancelling headset microphone

MIC 054 Directional lapel mic

MIC 058 Dual muff headset microphone

MIC 068 Heavy-duty dual-muff headset microphone

MIC 088 Dual muff hardhat headset microphone


CHG 3502 Manual Manuals English, Español, Français
FM Brochure - Low Res Brochures English
FM Brochure - High Res Brochures English
FM ADA Kit 37 Specifications Specifications English
PPA T46 User Manual English Manuals English
PPA T46 User Manual Portuguese (Brazil) Manuals Portuguese
PPA T46 User Manual Spanish Manuals Español
ADA Hearing Assistance Plaque Manuals English


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