Williams Sound PPA T45 Assistive Listening Transmitter

Williams Sound PPA T45 Assistive Listening Transmitter

Williams Sound PPA T45 Assistive Listening Transmitter

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Product Highlights

  • Multiple Digital Audio Input Options
  • OLED Display
  • Self Configuring for Easy Setup
  • High-Quality Audio and RF Performance
  • Includes Antenna
  • Includes Power Supply and IEC Power Cord
  • Includes Audio Cable: 3' RCA
  • Limited Lifetime Warranty
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$0.00 Tax Collected Outside NY and NJ

You Pay: $765.00

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Williams Sound PPA T45 overview

  • 1Description

The Williams Sound PPA T45 transmitter offers multiple digital audio input options, and an OLED high-resolution screen with simple menu navigation. It features 3 microprocessors and high-quality audio and RF performance, designed to take the guesswork out of complex audio installations. Simply select among voice, music, or hearing assistance in the application preset menu, and this transmitter quickly configures itself. With a range of up to 1000 feet, the PPA T45 is ideal for large venues where superior coverage is essential.

  • Multiple digital audio inputs (AES, SPDIF) provide direct connection to digital signal sources
  • OLED high-resolution screen with simplified menu navigation, offers comprehensive and convenient access to full system functions
  • DSP audio processing
  • Sleek and stylish new design
  • Simple set-up and operation
  • 1000’ operating range
  • OLED display, push-button menus
  • Microprocessor controlled
  • Adjustable RF power output
  • Combo XLR, 1/4” TRS inputs
  • Lifetime PLUS Limited Warranty (90 days on accessories)


Williams Sound PPA T45 specs

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, 18 W, 2.5 mm ID center positive barrel connector

Approvals: UL, CUL, Energy Star V, CSA listed
Indicators Power Indicators: Push On/Push Off latching power button, backlit Green indicates Power ON, back-lit off indicates power OFF

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

Temperature Range Operating: +32 to +104°F (0 to 40°C)
Storage: -4 to +158°F (-20 to 70°C)
Menu Options 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
Operating Frequencies 72.1 to 75.9 MHz, 17 wideband channels (selectable)
Frequency Accuracy ±2 ppm stability, 32 to 122°F (0 to 50˚C)
Deviation ±75 kHz maximum
Pre-Emphasis 75 µsec
  • RF Field Strength: Does not exceed 80 mV/m at 9.8' (3.0 m)
  • RF Timer: Menu selectable - 30 Min, 4 Hours, or Always On
    Time 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”


Antenna Type Compatible Antennas: ANT 005, ANT 021, ANT 024, or ANT 025
Transmission Range Up to 1000' (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
Audio Processing Functions DSP, Compression: 1:1, 1.5:1 or 2:1, High Pass and Low Pass Filter Frequency control
Frequency Response 31 Hz to 16 kHz, ±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 and 48 kHz
1x RCA for digital audio, S/PDIF, supported sample rates 44.1 and 48 kHz
Gain Adjustment In menu, adjustable to 0 to -50 dB, in 1 dB steps
Phantom Power 14.4 VDC applied through 2.2 kOhms resistors to analog combo jack: Pin 2 and Pin 3 on XLR jack, or tip and ring on 1/4" TRS jack
Input Level Microphone:
-55 dBV (1.7 mV RMS), nominal (1st amber LED)
-15 dBV (180 mV RMS), overload warning (displayed on screen)
+20 dBV (10.0 V RMS), absolute maximum ratings

-25 dBV (55 mV RMS), nominal (1st amber LED)
+16 dBV (6.3 V RMS), overload warning (displayed on screen)
+20 dBV (10.0 V RMS), absolute maximum ratings
Headphone Output 1/4" TRS stereo jack, mono signal, 15.7 mW, maximum in 33 Ohms (level adjustable in menu 0 to -40 dB in 2 dB steps)
Line Output RCA jack (black), -10 dBV (.32 V RMS), output impedance 100 Ohms
Ethernet RJ-45 on back of unit (PPA T45NET only)
Approvals FCC, RoHS2, WEEE, Industry Canada
Dimensions 8.45 x 8.25 x 1.72" (21.5 x 21 x 4.4 cm)
Weight Transmitter: 3.0 lb (1.36 kg)
Packaging Info
Package Weight 5.55 lb
Box Dimensions (LxWxH) 12.756 x 10.551 x 3.543"

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