The Personal PA® 457 features the cutting-edge PPA T45NET transmitter, with network control, 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 457NET 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 and is covered by Lifetime PLUS Limited Warranty.
NOTE: Approved by the FCC for operation in U.S. markets. The system cannot be used in all countries. Check with your government radio regulations for 72-76 MHz operation.
Used with |
PPA T45, PPA T45NET, PPA T27 Transmitters |
Connector type |
Screw to PCB |
Cable type |
N/A |
Nominal Impedance |
N/A |
Length |
39" |
Alkaline, 1.2 Volt
Plug |
3.5 mm mono |
Cord length |
39 inches |
Impedance |
32 Ohms |
Frequency Range |
20 - 20kHz |
Max input power |
5mV |
Sensitivity |
128dB @ 1kHz |
Driver size |
13 mm |
Weight |
9g |
Replacement earpad |
EAR 015 |
10-3/8" (L) x 6-¼" (W) x 1/8" (H)
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: | 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 |
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-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. |
PPA T45 / PPA T45NET
There shall be two models of the transmitter - one with Ethernet control capability and one without. The transmitter shall be a microprocessor-based unit. It may be configured through the on-screen menu. The model with Ethernet control will also be configurable over an Ethernet (10 base T) network accessible through common web based browsers. It shall have a transmitting range of up to 1000 feet. It shall have 17 wideband channels operating on 72.1–75.9 MHz. It shall be supplied with a top mount 39" whip antenna and external power supply.
Front Panel:
The transmitter shall have an OLED screen displaying current settings and menu functions. Channel/frequency selection, audio input source, audio presets (Hearing Assist, Music, Voice and Custom), audio input level, high and low pass filter, compressor gain and RF output power shall be configurable via the menu or web browser. There shall be a 10 segment LED indicating audio input level and an RF “on air" LED. A ¼" stereo headphone jack allows monitoring of the transmitted audio.
Rear Panel:
The transmitter shall be powered by an external 24VAC power supply. It shall have a 75Ω F-connector on the rear for remote antenna applications and an RCA line level output. It shall have analog ¼"/XLR combo microphone or line level input jack, XLR AES3 and S/PDIF RCA digital input jacks. The model with ethernet control shall have an RJ-45 Ethernet jack.
The transmitter shall be compatible with all Williams Sound FM wideband 72-76 MHz receivers and have a lifetime limited warranty.
The transmitter without network control shall be the Williams Sound model number PPA T45.
The transmitter with network control shall be the Williams Sound model number PPA T45NET.
Dimensions: |
8.45" W x 8.25" D x 1.72"H (21.5 cm x 21 cm x 4.4 cm) |
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Weight: |
Transmitter: 3.0 lbs (1.36 kg) |
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Shipping Weight: 4.50 lbs (2.04 kg) (Transmitter, Power Supply, Antenna and packaging) |
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Color: |
Black/Silver with black legends on the front, white legends on the back |
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Rack Mount: |
Standard 19" Rack, one EIA rack space high, 1/2 space wide |
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Power Supply:
|
Desktop Style Transformer (TFP 048). |
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Input: 100-240 VAC, 50/60 Hz. IEC Line Cord. |
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Output: 24 VDC, 750 mA, 18W. 2.5mm ID center positive barrel connector. |
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Approvals: UL, CUL, Energy Star V, CSA listed. |
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Power ON Indicator |
Push On/Push Off latching power button, backlit Green indicates Power ON, backlight off indicates power OFF. |
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Temperature Range: |
Operating: +32° F to +104° F (0° C to 40° C) |
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Storage: -4° F to +158° F (-20° C to 70° C) |
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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 |
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RF Section |
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Operating Frequencies: |
72.1-75.9 MHz , 17 wideband channels (selectable) |
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Frequency Accuracy: |
± 2 ppm stability, 0-50˚ C |
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Deviation: |
± 75 kHz maximum. |
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Pre-Emphasis: |
75 µsec. |
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RF Field Strength: |
Does not exceed 80 mV/m at 3 m |
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Compatible Antennas: |
ANT 005, ANT 021, ANT 024, ANT 025, ANT 028, ANT 029, ANT 034. | ||
Transmission Range: |
Up to 1000 ft (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector. |
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RF Timer: |
Menu selectable - 30 Min, 4 Hours, or Always On. Timer starts when no audio is present. |
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RF Power: |
Menu selectable - High, Medium, Low, OFF. |
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RF Outputs: |
(1x) #10-32 stud connector in center of unit (pcb mounted) (1x) F-connector on rear chassis |
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RF Transmit Indicator: |
1 Green LED, indicates RF “ON" |
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Audio Section |
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Audio Processor Functions: |
DSP. Compression: 1:1, 1.5:1 or 2:1. High Pass and Low Pass Filter Frequency control. |
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Frequency Response: |
31 – 16000 Hz, ±3 dB (“Music" Audio Preset) |
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Signal-to-Noise Ratio: |
≥74 dB Transmitted RF |
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Total Harmonic Distortion: |
Less than 0.25% @ 1 kHz (RF output) |
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Common Mode Rejection: |
>57 dB @ 1 kHz, Mic or Line |
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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. |
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Audio Input Gain Adjust: |
In menu, adjustable to 0 to -50 dB, in 1dB steps |
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Phantom Power: |
14.4 VDC applied through 2.2 kΩ resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack |
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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. |
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Input Levels (Bal or Unbal): (at Audio Input Gain = 0dB) |
Nominal (1st Amber LED) |
Overload Warning (Displayed on Screen) |
Absolute Maximum Ratings* |
Microphone: |
-55 dBV (1.7 mV RMS) |
-15 dBV (180 mV RMS) |
+20dBV (10.0 V RMS) |
Line: |
-25 dBV (55 mV RMS) |
+16 dBV (6.3 V RMS) |
+20 dBV (10.0 V RMS) |
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Headphone Output: |
1/4" TRS stereo jack, mono signal, 15.7 mW, maximum in 33 Ω (level adjustable in menu 0 to -40 dB in 2 dB steps) |
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Line Output: |
RCA jack (black), -10 dBV (.32 VRMS). Output impedance 100 Ω. |
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Ethernet: |
RJ-45 on back of unit (PPA T45NET only) |
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Approvals: |
FCC, RoHS2, WEEE, Industry Canada |
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Warranty: |
Lifetime PLUS Limited Warranty (90 Days on most accessories) |
Input: 100-240 VAC, 50/60 Hz, 0.5 A
Output: 24 VDC, 0.75 A
0.3 lbs
Description |
Single RCA - RCA audio cable |
Used with |
PPA T27, PPA T45, PPA T45NET audio input cable |
Connector type |
RCA - RCA |
Cable type |
Two-conductor |
Impedance |
N/A |
Length |
3 ft |
All Williams Sound headphones and earphones are compatible with this product.
Download/View | Name | Type | Language |
---|---|---|---|
PPA R37 Manual Español | Manuals | Español | |
PPA 457 All Versions - Specifications | Specifications | English | |
PPA T45 User Manual - Portuguese | Manuals | Portuguese | |
72 MHz FM Antennas | Application Guides | English | |
PPA T45 User Manual - Spanish | Manuals | Español | |
PPA T45 Specifications | Specifications | English | |
PPA T45NET Mobile App (Android) | Mobile App | English | |
PPA T45NET Mobile App (IOS) | Mobile App | English | |
PPA R37 Manual French | Manuals | Français | |
PPA 457 All Versions - Sell Sheet | Sell Sheets | English | |
FM Frequency/Channel Chart | Technical Bulletins | English | |
PPA R37 Manual | Manuals | English | |
PPA T45 User Manual - English | Manuals | English | |
PPA R37 Specifications | Specifications | English |
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