Williams Sound PPA R37-20

Availability: Available Unavailable

Product Type: Pro Audio

Product Vendor: Williams Sound

Product SKU:

A Personal PA Your audience is ready and waiting … to be soothed by a pastor’s sermon, to be mesmerized by the leading man’s monologue, to be pumped by an announcer’s play-by-play. From houses of worship to performing arts centers...

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Product Details

A Personal PA Your audience is ready and waiting … to be soothed by a pastor’s sermon, to be mesmerized by the leading man’s monologue, to be pumped by an announcer’s play-by-play. From houses of worship to performing arts centers to football stadiums, FM listening technology from Williams Sound ensures every listener in attendance can hear your message clearly. Our FM systems provide peace of mind, every time — complete, turn-key solutions that meet your facility’s needs for hearing assistance, language interpretation, audio description or ADA compliance. PPA Select™ FM receiver The NEW PPA Select FM receiver features easy-to-use, seek-button channel selection with access to 17 pre-set wideband frequencies between 72-76 MHz. Digitally synthesized for even greater audio clarity and stability, the PPA Select also offers channel-lock capability (to prevent accidental channel change) and a battery-saving Sleep Mode. A versatile 3.5mm stereo/mono jack allows for a variety of earphone and headphone options, and is neckloop/telecoil-equipped-hearing-aid compatible. The stylish, impact-resistant PPA Select single-channel receiver is compatible with any Williams Sound Personal PA transmitter operating on the 72-76 MHz bandwidth. The PPA Select includes two AA alkaline batteries for up to 50 hours of long-lasting operation. NOTE: The PPA Select Receiver requires a transmitter operating on 72-76 MHz. The PPA Select is approved by the FCC for operation in U.S. Markets. The receiver cannot be used in all countries. Check with your government´s radio regulations for 72-76 MHz operation


BAT 001-2

Alkaline, 1.2 Volt

EAR 022


Around-ear speaker


3.5mm mono



Driver Size

23 mm

Nominal Impedance


Freq. Response

20 - 20kHz



Max Power Input

30 mW


118 dB @ 1kHz

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 2?V or better at 12dB Sinad with squelch defeated. The R37 shall accept up to ±75kHz FM deviation and have a 75 ? 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.



4.1” x 2.85” x 1.38” (104 x 72 x 35mm)


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


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


75 µS

LED Indicator:

Power:  Green; Low Battery:  Flashes Green

AFC Range:

± 120 kHz


2 µV at 12 dB Sinad with squelch defeated

Input Overload:

100 mV

Frequency Response:

200 – 15 kHz


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


Earbud-type with foam cushion, 3.5 mm plug, 32 ?

Auto Shut-off

Enters sleep mode after approx 6 mins of no RF signal


FCC, Industry Canada, RoHS, WEEE


Lifetime PLUS Limited Warranty, 90 Days on most accessories.


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