20 PPA R37N; 20 EAR 022; 20 BAT 001-2

The Williams AV PPA R37-20 is a coordinated 20-pack FM receiver bundle containing 20 PPA R37N receivers, 20 EAR 022 around-ear speakers, and alkaline batteries. It provides matching listening hardware for up to 20 receiver positions while keeping the receivers, audio accessories, and battery supplies together under one bundle SKU. Each receiver operates across 17 selectable channels within the listed 72.1 to 75.9 MHz frequency range.

Ideal Use Cases

This bundle is suited to group listening installations that need as many as 20 individual FM receivers. It can expand an existing compatible FM system or establish a standardized pool of receivers for repeated group use. Because every position receives the same receiver and EAR 022 speaker combination, operators can maintain a consistent hardware setup across the group. A transmitter is not identified among the included items, so the receivers should be paired with a compatible system operating on one of the supported frequencies.

Why Choose This Model

The PPA R37 receiver combines straightforward channel access with practical battery management. Its 17 channels are accessed through a seek button located in the battery compartment. A green LED indicates power, while a flashing green LED signals a low battery. The receiver accepts two AA alkaline batteries or two AA NiMH batteries. With two non-rechargeable BAT 001 alkaline batteries, the listed operating time is approximately 50 hours.

An automatic sleep function reduces unnecessary operation by placing the receiver into sleep mode after approximately six minutes without an RF signal. The 3.5 mm stereo/mono phone jack supports the supplied listening accessory, and the earphone or headphone cord functions as the receiver antenna.

Installation and Integration

Integration begins by installing two compatible AA batteries in each receiver and connecting the supplied EAR 022 accessory to the 3.5 mm output. The receiver channel can then be selected with the seek control inside the battery compartment. The chosen channel must correspond to the operating frequency used by the compatible FM system.

Because the antenna is integral to the connected earphone or headphone cord, the audio accessory is part of the reception configuration. The receiver is specified for operation from 0 to 50 degrees C and measures 4.1 x 2.85 x 1.38 inches, or 104 x 72 x 35 mm.

Performance Highlights

The receiver covers 72.1 through 72.9 MHz, 74.7 MHz, and 75.3 through 75.9 MHz. Its listed receiver frequency response is 200 Hz to 15 kHz, with a signal-to-noise ratio of at least 65 dB at 100 uV. Technical parameters include a 75 kHz intermediate frequency, 75 kHz FM deviation, 75 microsecond de-emphasis, and an AFC range of +/- 120 kHz. Input overload is rated at 100 mV.

Audio output is specified at a maximum peak level of 35 mW into 16 ohms. The supplied EAR 022 around-ear speaker has a 3.5 mm mono plug, 39-inch cord, 23 mm driver, 32-ohm nominal impedance, and a listed frequency response of 20 Hz to 20 kHz. Its maximum input is 30 mW, sensitivity is 118 dB at 1 kHz, and listed weight is 15 g.

What Makes It Different

The defining advantage of the PPA R37-20 is its complete 20-position configuration. Rather than supplying receivers alone, the bundle includes matching EAR 022 listening accessories and alkaline batteries. This simplifies the preparation of a larger receiver pool and ensures that the essential listener-side components are represented in the same package.

The receiver carries listed FCC, Industry Canada, RoHS, and WEEE approvals. Warranty coverage is identified as a Lifetime PLUS Limited Warranty, with 90-day coverage on most accessories. The distinction between receiver and accessory coverage should be considered when reviewing the bundle warranty.

Final Assessment

The Williams AV PPA R37-20 is a focused choice for a compatible FM installation requiring 20 receiver positions. Its 17-channel operation, approximately 50-hour alkaline battery life, automatic sleep mode, status LED, and included EAR 022 speakers address the core requirements of managing a group receiver set. The packaged quantities make it especially relevant when uniform equipment allocation and consolidated preparation are priorities.