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Williams Sound PPA-457
Personal PA FM Assistive Listening System With Neckloops and Earphones

OUR PART #:  PPA-457

The Williams Sound Personal PA® 457 features the cutting-edge PPA T45 transmitter...
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List Price: $1,318.00
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Williams Sound PPA-457
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The Williams Sound Personal PA® 457 features the cutting-edge PPA T45 transmitter, with multiple digital audio input options and an OLED display with easy-to-manage menu navigation. Features three powerful microprocessors and the same high-quality audio and RF performance you’ve come to expect from Williams Sound. With an operating range of up to 1000 feet, the PPA 457 is ideal for large venues where superior coverage is essential. This complete turnkey solution includes four PPA R37 receivers, each featuring seek-button channel selection with access to 17 pre-set wideband frequencies between 72-76 MHz. The system is expandable, accommodating any number of listeners. This system complies with 2010 ADA guidelines for hearing assistance.

Williams Sound PPA-457 Includes:

  • (4) PPA R37 Receivers
  • (2) NKL 001 Neckloops
  • (4) EAR 013 Earphones
  • (1) ANT 025 Whip Antenna
  • (1) WCA 013 Audio Cable
  • (1) TFP 048 Power Supply
  • (1) IDP 008 ADA Wall Plaque
  • (8) BAT 001 AA Alkaline Batteriesited Warranty.

Williams Sound PPA-457 Features:

  • T45 professional transmitter
  • Up to 1000’ operating range
  • OLED display, push-button menus
  • Microprocessor controlled
  • Accommodates any number of listeners
  • Adjustable power output
  • Combo XLR, ¼” TRS inputs
  • Meets ADAAG guidelines
  • Made in the USA

Williams Sound PPA-457 Specifications:

  • EAR 013
    • Plug: 3.5 mm mono
    • Cord length: 39"
    • Impedance: 32 Ohms
    • Frequency Range: 20 - 20kHz
    • Max input power: 5mV
    • Sensitivity: 128dB @ 1kHz
    • Driver size: 13 mm
    • Weight: 9g
    • Replacement earpad: EAR 015
  • 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    
    • Color: Black
    • Battery Type: (2) AA Alkaline or 2 x AA NiMH   
    • Battery Life:
      • (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 50°C
    • 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
    • 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 Ohms Auto Shut-off Enters sleep mode after approx 6 mins of no RF signal
    • Approvals: FCC, Industry Canada, RoHS, WEEE
  • PPA T45
    • Dimensions (WxDxH): 8.45" x 8.25" x 1.72"
    • Weight: Transmitter: 3.0 lbs (1.36 kg)
    • Rack Mount: Standard 19" Rack, one EIA rack space high, 1/2 space wide | 1–2 units can be mounted in a single rack space with optional RPK 005 (single) or RPK 006 (double) Rack Mount Kits
    • Power Supply: Desktop Style Transformer (TFP 048).
    • Input: 100-240 VAC, 50/60 Hz.  IEC Line Cord.
    • Output: 24 VDC, 750 mA, 18W.  2.5mm ID center positive barrel connector.  
    • Approvals:  UL, CUL, Energy Star V, CSA listed.
    • Power ON Indicator: Push On/Push Off latching power button, backlit Green indicates Power ON, backlight off indicates power OFF.
    • Temperature Range:
      • Operating: +32° F to +104° F (0° C to 40° C)
      • Storage: -4° F to +158° F (-20° C to 70° C)
    • Menu Settings: Audio Presets (Music, Voice, Hearing Assist, Custom), Frequency/Channel selection, Frequency/Channel mode, Audio Input Source (Microphone, Line, Phantom, Digital AES/EB, Digital S/PDIF), High Pass Filter, Low Pass Filter, Compression, RF Output Power, Screen Saver Delay, Test Tone (400 Hz), Headphone Volume, Headphone Source
    • RF Section
      • Operating Frequencies: 72.1-75.9 MHz , 17 wideband channels (selectable)
      • Frequency Accuracy: ± 2 ppm stability, 0-50° C
      • Deviation: ± 75 kHz maximum.
      • Pre-Emphasis: 75 µsec.
      • RF?Field Strength: Does not exceed 80 mV/m at 3 m
      • Compatible Antennas: ANT 005, ANT 021, ANT 024, or ANT 025.
      • Transmission Range: Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector.
      • RF Timer: Menu selectable - 30 Min, 4 Hours, or Always On.  Timer starts when no audio is present.
      • RF Power: Menu selectable - High, Medium, Low, OFF.
      • RF Outputs:
        • (1x) #10-32 stud connector in center of unit(pcb mounted)
        • (1x) F-connector on rear chassis
      • RF Transmit Indicator: 1 Green LED, indicates RF “ON”
    • Audio Section
      • Audio Processor Functions: DSP.  Compression: 1:1, 1.5:1 or 2:1. High Pass and Low Pass Filter Frequency control.
      • Frequency Response: 31 – 16000 Hz, ±3 dB (“Music” Audio Preset)
      • Signal-to-Noise Ratio: =74 dB Transmitted RF
      • Total Harmonic Distortion: Less than 0.25% @ 1 kHz (RF output)
      • Common Mode Rejection: >57 dB @ 1 kHz, Mic or Line
      • Audio Inputs:
      • (1x) Combination 3-pin XLR, 1/4" TRS jack for Mic or Line Level Analog Audio.  Balanced or Unbalanced Line Level, or Microphone with Selectable Phantom Power.
      • (1x) XLR for Digital Audio, AES3/EBU, supported sample rates 44.1 kHz and 48 kHz.
      • (1x) RCA for Digital Audio, S/PDIF, supported sample rates 44.1 kHz and 48 kHz.
      • Audio Input Gain Adjust: In menu, adjustable to 0 to -50 dB, in 1dB steps
      • Phantom Power: 14.4 VDC applied through 2.2 kOhm resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack
      • Audio Level Indicators: 10-LED?array that reads -18 to +9 dB at 3 dB intervals. 7 Green, 2 Amber, and 1 red LED.  Green LEDS indicate normal operating audio level peaks, Amber LEDS indicate close to overload peaks, Red LED indicates overload peaks.
3V 12 Unit Charger for R35
Williams Sound CHG3512 3V 12 Unit Charger for R35
The Williams Sound CHG3512 charges over the course of a four hour time span.  It helps keep your receivers organized and saves cost on having to replace alkaline batteries.  Features individual charging LED indicators.  LEDs ...
366.80 524.00 30

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Rack Kit, Dual
Williams Sound RPK-006 Rack Kit, Dual
Dual rack mount kit for half-rack space products.
58.50 65.00 10

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Free Shipping Available
Single Rack Mount Kit for 1/2 Space Units
Williams Sound RPK-005 Single Rack Mount Kit for 1/2 Space Units
Single Rack Mount Kit for 1/2 Space Williams Sound Units.
55.80 62.00 10

In Stock
Free Shipping Available
Neckloop Coupler, 18.5" Cord, 3.5mm Plug
Williams Sound NKL-001 Neckloop Coupler, 18.5" Cord, 3.5mm Plug
The neckloop is designed to magnetically couple the audio output from a Williams Sound unit into a hearing aid equipped with a telephone coil.  It will also work with tape players, TVs, and any device which has an 8-16 Ohm audio ...
38.25 51.00 25

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Dual Stereo Isolation Earphones
Williams Sound EAR-042 Dual Stereo Isolation Earphones
Dual mini isolation earphone. Fits in the outer part of the ear.  Specifications: Style: Dual, in-ear, isolation earphones Plug: 3.5mm stereo Cord: 39” Driver Size: 10 mm Nominal Impedance: 32O Freq. Response: 20 - 20kHz ...
13.69 23.00 40

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Single Ear Bud, Mini Isolation
Williams Sound EAR-041 Single Ear Bud, Mini Isolation
Mini isolation single earbud, fits in the outer part of the ear. 32 Ohms, mono.
12.00 20.00 40

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Headphone,Behind the Ear
Williams Sound HED-026 Headphone,Behind the Ear
The stylish HED 026 rear-wear headphone offers excellent sound quality; it rests comfortably over the ears and wraps around the back of the head for a less obtrusive, relaxed fit.

In Stock
Mini Earphone
Williams Sound Ear 013T Mini Earphone
Single Mini Earphone with Flexible Eartip
18.49 18.50

In Stock
Single Over-Ear Headphone
Williams Sound EAR-008 Single Over-Ear Headphone
Wide-range earphone. Hangs on outside of ear. Excellent Sound quality. 1m cord. Recommended for FM Receivers, Select IR Receivers, and Pocketalker. For mild to moderate hearing loss.

In Stock
Mini Earphone, Single
Williams Sound EAR-013 Mini Earphone, Single
Single Mini Earbud. Fits in the outer part of the ear. 1m Cord. Foam cushions are washable and replaceable. Recommended for FM Receivers, Select IR Recievers, and Pocketalker. For mild to moderate hearing loss.

In Stock
Deluxe Folding Headphone
Williams Sound HED-021 Deluxe Folding Headphone
Comfortable dual headphones have an adjustable headband. Foam cushions can be washed or replaced. 3.5mm plug, 1m cord. Recommended for FM Receivers, Select IR Receivers, and Pocketalker. For mild to moderate hearing loss.

In Stock
Wide Range Earphone
Williams Sound EAR 022 Wide Range Earphone
Surround Earphone. Hangs on outside of ear. Excellent sound quality. 32 O, mono. Hearing loss rating: mild and low gain. 0.04 lbs.

In Stock
Antenna 75ohm Coax 22Ft
Williams Sound ANT-005 Antenna 75ohm Coax 22Ft
Extends 22’. This optional antenna can be used with any Personal PA system or large-area FM transmitter. The 50´ Antenna Extension Cable (WCA 008 50) can also be used. Provides maximum system range.
88.20 98.00 10

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Headset, Heavy Duty Folding
Williams Sound HED-027 Headset, Heavy Duty Folding
Ultimate heavy duty folding headphones.

Usually ships in 7-14 business days.
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Dual Mini Earphones (Ear Buds)
Williams Sound EAR-014 Dual Mini Earphones (Ear Buds)
Williams Sound's EAR-014 is a dual-ear mini earbud for use with personal assistive listening devices. It features an angled 1/8" mini plug and foam earpads. 

Usually ships in 7-14 business days.

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