Radio Design Labs FP-TPSR4A
Two-Pair Audio Send/Rec, Format-A


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Radio Design Labs' FP-TPSR4A is a sender and receiver that provides the interface between a hotel room television and listening stations and audio input panels.

The Sender Section is an RDL Format-A audio sender that accepts either a stereo line-level or 1 to 3 Watt mono amplified fixed-level signal, usually from a commercial hospitality equipped TV. The FP-TPS4A distributes the source signal to two Format-A RJ45 output jacks to feed multiple Format-A receivers.

The input accepts either an unbalanced stereo or an amplified mono input. The FP-TPSR4A sends the unbalanced Left and Right sources over balanced twisted-pair cables on pairs B and C. If a mono amplified signal is connected, the mono source is fed to both pairs B and C. Audio circuitry is active balanced for superior audio fidelity and low-noise performance.

The Receiver Section is an RDL Format-A receiver with an RJ45 input fed by sender modules such as the D-TPS8A stereo input panel for portable computer or media player. Audio signals received on pairs B and C are amplified to feed two stereo RCA connectors at a standard -10 dBV consumer level. One of these outputs connects to the TV AUX input, the other is available to feed the input of a stereo amplifier in the room.

The FP-TPSR4A is normally mounted behind a TV where AC power is available. A 24 Vdc power supply, available separately, provides power to the FP-TPSR4A and to the connected sending and receiving modules. It is not necessary to connect power supplies to the connected senders and receivers, facilitating installation. A front-panel blue LED is illuminated when the FP-TPSR4A is receiving and distributing 24 Vdc to all three RJ45 jacks. The distributed output DC voltage is short-circuit protected by an automatically resetting fuse. A power fault on either output jack causes the blue LED to extinguish.

The FP-TPSR4A is ideally suited to guest room installations with bedside and restroom listening stations. The inputs and outputs are fully compatible with all RDL Format-A receivers. RDL Format-A features design simplicity, ease of installation, flexibility, automatic fused power, exceptional hum rejection, low noise, and low distortion - to provide designers and installers the optimum choice in economical twisted pair products.

Radio Design Labs FP-TPSR4A Features:

  • Combination Sender and Receiver Module
  • Ideal for Hotel Room Audio Systems
  • Distributes Power to All Connected Modules
  • Automatically Resetting Fuse for Output Voltage
  • Ultra-Compact All Metal Construction
  • Format-A Sender from TV Fixed Audio Output
  • Sends Left and Right Audio Channels
  • Unbalanced Stereo Input from Fixed Level Audio Source
  • Balanced Audio Input from Mono Amplifier
  • High Quality Audio Distributed to Each RJ45 Output
  • Two Format-A Outputs on RJ45
  • Format-A Receiver Compatible with 2 Pair Senders such as D-TPS8A
  • Two -10 dBV stereo unbalanced outputs on RCA connectors
  • L (Left) Output From Pair B; R (Right) From Pair C
  • The output feeds the AUX input of the television

Radio Design Labs FP-TPSR4A Specifications:

  • Inputs (3):
    • 20 kOhm unbalanced (2, left and right)
    • 100 Ohm balanced (mono amplified)
  • Input Connection: Phono Jack (Unbal.); Mini-jack (Bal.)
  • Input Level: -10 dBV unbalanced; 1 W (8 Ohms) to 10 W (8 Ohms) balanced, 2 W nominal
  • Format-A Signal Pairs Used (2): B, C
  • Output: RDL TP Format-A
  • Output Connection: RJ45
  • Frequency Response: 10 Hz to 50 kHz (┬▒ 0.1 dB)
  • THD+N: < 0.05%
  • Noise below +4 dBu: < -85 dB
  • Crosstalk:
    • < -85 dB (10 Hz to 10 kHz)
    • < -80 dB (10 kHz to 20 kHz)
  • Headroom above +4 dBu: > 18 dB
  • Receiver Section
    • Input:: RDL Format-A
    • Input Connection: RJ45
    • Format-A Signal Pairs Used (2):
      • B (Left)
      • C (Right)
    • Output: 100 Ohm unbalanced
    • Output Connections (2): RCA Phono stereo
    • Frequency Response: 10 Hz to 40 kHz (┬▒ 0.1 dB)
    • THD+N: < 0.005%
    • Noise below +4 dBu: < -90 dB
    • Crosstalk:
      • < 90 dB (1 kHz)
      • <75 dB (20 Hz to 20 kHz)
    • Headroom above -10 dBV: > 20 dB
    • CMRR: Power (Input and outputs active)
    • Power Connection: Power Jack (locking)
    • Maximum Load Current: 500 mA
    • Power Requirement: 24 Vdc @ 35 mA plus connected loads
  • Dimensions:
    • 6.58" (16.7 cm) L
    • 3.25" (8.6 cm) W
    • 1.68" (4.27 cm) H
  • Package Type: Cardboard Box
  • Package Dimensions: 4.375 x 7 x 2.25 in.
  • Shipping Weight: 1.005 lbs.
  • WEEE weight: 0.775 lbs.
  • Tariff code: 8517.18.0000
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