Radio Design Labs DB-TPR3A
Active Three-Pair Receiver Wall Plate with XLR and RCA Connectors


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The Radio Design Labs DB-TPR3A module is a three-pair audio receiving module compatible with RDL® Format-A twisted pair products. This module is designed to be mounted in wall boxes, cabinets or other enclosures that allow users to connect external equipment. The DB-TPR3A model mounts in RDL WB-1U and WB-2U wall boxes, or in standard U.S. electrical boxes. The DB-TPR3A features a black front-panel laminate.

The DB-TPR3A module features an XLR audio output and two RCA phono jack outputs, one for the left channel and one for the right channel. The audio signal received from pair A of the RJ45 INPUT jack feeds the XLR audio output jack. The output level from the XLR jack is set to either MIC or LINE level during installation using a rear-panel switch. The audio signals received from pairs B and C of the twisted pair cable are buffered to drive the RCA output jacks at the standard -10 dBV consumer level.

Although the DB-TPR3A module accesses signals from all three cable pairs, additional receivers may be connected to the same twisted pair feed. The bridging input circuits used in all FORMAT-A twisted pair receivers allow connection of up to 10 receiver outputs for each cable pair. The possibility of multiple receiver locations adds enormous flexibility in the design of audio routing systems using RDL FORMAT-A products.
The DB-TPR3A may be powered directly from a 24 Vdc power supply using the rear-panel detachable terminal block. Local power connected to the module is also fed to all connected remote modules. The DB-TPR3A may be remotely powered through the twisted pair cable from any other module, signal distributor or RDL power inserter connected to the same twisted pair cable. Module power is indicated by a front-panel LED.

RDL FORMAT-A features superior audio performance that rivals or exceeds shielded wiring. Design simplicity, ease of installation, unsurpassed flexibility, automatic fused power, exceptional hum rejection, low noise, and low distortion provide designers and installers the optimum choice in economical twisted pair products.

NOTE:  Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product. Please click here for more information on the PS-24AS power supply.

Radio Design Labs DB-TPR3A Features:

  • Balanced Mic or Line Level XLR Output
  • Switch-Selectable Output Level on Rear Panel
  • Two Unbalanced -10 dBV Phono Jack Audio Outputs
  • XLR From Pair A; L From Pair B; R From Pair C
  • Remote Powering through Twisted Pair Cable
  • Fused Local Power Feeds all Connected Modules
  • Local Power Input on Terminal Block
  • Blue LED Indicates Module is Powered
  • Utilizes All Three Format-A Pairs
  • Studio-Quality Precision Active Balanced Circuitry

Radio Design Labs DB-TPR3A Specifications:

  • Input:  RDL FORMAT-A
  • Input Connection:  RJ45 (Models D-, DS-); Detachable Terminal Block (Model EM-)
  • Format-A Signal Pairs Used (3):  A, B, C
  • Outputs (3):  150 Ohms balanced; 100 Ohms unbalanced
  • Output Connection:  XLR (balanced Mic or Line); RCA Phono Jack (2)
  • Output Level:
    • XLR:  -45 dBu Mic or +4 dBu Line Level, Switch-selectable on rear panel;
    • RCA phono:  -10 dBV
  • Frequency Response:  10 Hz to 50 kHz (± 0.1 dB)
  • THD+N:  < 0.005%
  • Noise below +4 dBu:  < -90dB
  • Crosstalk:  < 90 dB (1 kHz); < 75 dB (20 Hz to 20 kHz)
  • Headroom above +4 dBu:  > 18dB
  • CMRR:  > 80dB (50 Hz to 150 Hz)
  • Indicator:  Power In
  • Connections (2):  Detachable terminal block; RJ45
  • Ambient Operating Environment:  0° C to 55° C
  • Power Requirement:  24 Vdc @ 45 mA plus connected loads
  • Dimensions:  1.6" (4.06 cm) W; 4.11" (10.45 cm) H; 1.89" (4.8 cm) D
  • Mounting Box Minimum Depth:  2.4" (Models D-, DS-); 39 mm (ModelEM-)
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