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The PPA T45NET Personal PA FM Base Station Transmitter with Network Control from Williams Sound is an assistive listening transmitter that provides you the option of network control and monitoring via its Ethernet port. It has a 1000-foot range of operation for use in larger areas, and features both analog and digital inputs for a variety of connectivity options. In addition to its network control capabilities, the PPA T45NET can be controlled via its front-panel push buttons and OLED screen.
Network Control Capability via Ethernet (10-base-T) using any web browser
Multiple Digital Audio Inputs (AES, SPDIF) provide direct connection to digital signal sources
OLED high-resolution screen with simplified menu navigation, offers access to full system functions
DSP Audio Processing
Simple set-up and operation
1000' operating range
OLED display, push-button menus
Adjustable RF power output
Combo XLR, 1/4" TRS inputs
In the Box
Williams Sound PPA T45NET Personal PA FM Base Station Transmitter with Network Control
72.1 to 75.9 MHz , 17 wideband channels (selectable)
± 2 ppm stability, 0 to 50˚C
± 75 kHz maximum
RF Field Strength
Does not exceed 80 mV/m @ 3 m
Compatible Antennas: ANT 005, ANT 021, ANT 024, or ANT 025
Up to 1000' (304 m) with ANT 005 coaxial antenna mounted on rear chassis connector
Timer: Menu selectable - 30 minutes, 4 hours, or Always On. Timer starts when no audio is present Power: Menu selectable - High, Medium, Low, Off Outputs: 1x #10-32 stud connector in center of unit (PCB mounted), 1x F-connector on rear chassis Transmit Indicator: 1 Green LED, indicates RF ON
DSP: Compression: 1:1, 1.5:1 or 2:1; High Pass and Low Pass Filter Frequency control
31 Hz to 16000 kHz, ±3 dB (Music Audio Preset)
Signal to Noise Ratio
≥74 dB Transmitted RF
Total Harmonic Distortion
< 0.25% @ 1 kHz (RF output)
>57 dB @ 1 kHz, Mic or Line
1x Combination 3-pin XLR, 1/4" (6.3 mm) 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.
Input Gain Adjustment
In menu, adjustable to 0 to -50 dB, in 1 dB steps
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" (6.3 mm) 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
Microphone Input Levels @ 0 dB, Balanced or Unbalanced: Nominal: -55 dBV (1.7 mV RMS) Overload Warning: -15 dBV (180 mV RMS)
Absolute Maximum Ratings: +20 dBV (10.0 V RMS)
Line Input Levels @ 0 dB, Balanced or Unbalanced: Nominal: -25 dBV (55 mV RMS) Overload Warning: +16 dBV (6.3 V RMS) Absolute Maximum Ratings: +20 dBV (10.0 V RMS)
1/4" (6.3 mm) TRS stereo jack, mono signal 15.7 mW, maximum in 33 Ω (level adjustable in menu 0 to -40 dB in 2 dB steps)