Active Three-Pair Receiver-Twisted Pair Format-A-XLR and stereo phono outputs-Black

The RDL DB-TPR3A is a black active receiver that uses all three signal pairs in an RDL Format-A twisted-pair connection. Pair A is routed to a balanced XLR output, while Pair B feeds the left RCA phono output and Pair C feeds the right RCA phono output. The XLR can operate at either -45 dBu microphone level or +4 dBu line level through a rear-panel switch. Both unbalanced RCA outputs operate at -10 dBV.

Ideal Use Cases

This model is intended for Format-A systems that need to recover three audio signals at one destination. Its dedicated pair routing supports equipment requiring a balanced microphone- or line-level XLR connection alongside left and right unbalanced RCA phono connections. It is particularly applicable when all three Format-A pairs must be used simultaneously instead of receiving only one or two pairs.

• Receiving three signals from an RDL Format-A connection
• Feeding balanced equipment at microphone or line level
• Providing left and right -10 dBV signals to equipment with RCA inputs
• Powering the receiver remotely through the twisted-pair cable or from a local 24 Vdc source

Why Choose This Model

The DB-TPR3A combines three clearly assigned outputs with studio-quality precision active balanced circuitry. The switch-selectable XLR level allows the same balanced output to interface with either microphone-level or +4 dBu line-level equipment without changing the pair assignment. The two RCA phono outputs provide fixed -10 dBV left and right signals. This arrangement makes each Format-A pair immediately available through a defined output: XLR from Pair A, left RCA from Pair B, and right RCA from Pair C.

Installation and Integration

The input is RDL Format-A. Published input connection options are RJ45 for D- and DS- models and a detachable terminal block for the EM model. Power can enter through either the RJ45 connection or a detachable terminal block. Remote powering through the twisted-pair cable reduces the need for a separate power source at the receiver, while the local terminal-block input provides another installation option. When locally powered, the fused power feed supplies connected modules.

The unit requires 24 Vdc at 45 mA plus the requirements of connected loads. Recommended power supplies, which are not included, are the PS-24AS for the USA and PS-24AX for international use. A blue LED provides a visible indication that the module is powered. The listed minimum mounting-box depth is 2.4 inches for D- and DS- models and 39 mm for the EM model. Overall dimensions are 1.6 inches wide, 4.11 inches high, and 1.89 inches deep.

Performance Highlights

The active audio circuitry has a specified frequency response of 10 Hz to 50 kHz within ±0.1 dB. THD+N is less than 0.005%, and noise below +4 dBu is specified at less than -90 dB. Headroom above +4 dBu exceeds 18 dB. Common-mode rejection is greater than 80 dB from 50 Hz to 150 Hz.

Specified crosstalk is less than 90 dB at 1 kHz and less than 75 dB from 20 Hz to 20 kHz. The balanced output is rated at 150 ohms, while the unbalanced outputs are rated at 100 ohms. The XLR provides either -45 dBu microphone level or +4 dBu line level, and the two RCA phono jacks provide -10 dBV outputs.

What Makes It Different

The defining feature of the DB-TPR3A is its use of all three Format-A pairs with a different output assigned to each one. It does not require Pair A, Pair B, and Pair C to share a common connector type or output level. Instead, it combines a selectable balanced XLR path with two fixed-level unbalanced RCA paths. Remote powering, a fused local power feed, terminal-block power input, and a blue power indicator are integrated into the same compact receiver.

Final Assessment

The RDL DB-TPR3A provides a direct way to receive all three RDL Format-A pairs and present them as one balanced XLR output plus left and right RCA phono outputs. Its selectable microphone or line output level, specified wide frequency response, low THD+N, remote and local powering options, and fixed pair-to-output routing make it a focused choice for three-pair Format-A audio integration.