Passive Single-Pair Sender-Twisted Pair Format-A-stereo phono jack inputs

Ideal Use Cases

The RDL D-TPS6A is a passive single-pair sender for systems that need to place an unbalanced stereo source onto an RDL TP Format-A connection as a mono signal. Its two RCA input jacks accommodate stereo audio, while the internal circuit combines the channels to mono. A rear-panel switch assigns that signal to Format-A pair A, B, or C. This selectable routing makes the unit suitable for an installation in which different signal pairs are already allocated. It can also be daisy-chained with single-pair or two-pair Format-A senders, allowing the D-TPS6A to become part of a larger compatible signal path.

Why Choose This Model

The D-TPS6A combines stereo-to-mono conversion, selectable signal-pair routing, pass-through connectivity, and transformer isolation in one compact device. Its passive circuitry does not require external power, so installation does not depend on a local outlet or separate power supply. Galvanic isolation is provided through a studio-quality transformer. The two RJ45 TP CABLE connections pass signal and power pairs through the unit, while the selected pair carries the mono audio derived from the RCA inputs. This arrangement lets the sender add an audio source to a compatible Format-A connection without interrupting the other pass-through pairs.

Installation and Integration

Connect the unbalanced stereo source to the two RCA input jacks, then use the rear-panel switch to select signal pair A, B, or C. The Format-A input and output connections use RJ45 TP CABLE jacks, with the output carrying RDL TP Format-A. Because the D-TPS6A is passive, there is no power connection to wire or configure. Signal and power pair pass-through between the RJ45 jacks supports integration with other compatible Format-A devices, including daisy-chain arrangements with single-pair and two-pair senders. The enclosure measures 1.6 inches wide, 4.11 inches high, and 1.89 inches deep, or 4.06 by 10.45 by 4.8 centimeters, providing a clearly defined footprint for installation planning.

Performance Highlights

The input consists of two unbalanced RCA jacks, with stereo combined to mono. The specified input level is 10 dBV, with a maximum of +22 dBu. Frequency response extends from 20 Hz to 20 kHz within ±0.5 dB. Total harmonic distortion is less than 0.1 percent from 50 Hz to 20 kHz and is typically less than 0.001 percent at 1 kHz. The studio-quality transformer provides galvanic isolation between the source and the Format-A signal path. Since the audio circuit is passive, these functions are delivered without an external power requirement.

What Makes It Different

The D-TPS6A is more than an RCA-to-RJ45 connection point. It combines the left and right unbalanced inputs into one mono output and then allows the installer to choose exactly which Format-A signal pair receives that output. Pair A, B, or C can be selected directly from the rear panel. At the same time, the RJ45 connections maintain signal and power pair pass-through. This combination of selectable pair assignment and pass-through operation distinguishes the model within compatible multi-pair installations. Its support for daisy-chaining with both single-pair and two-pair Format-A senders further defines how it can be incorporated into an existing RDL TP Format-A system.

Final Assessment

The RDL D-TPS6A provides a focused solution for converting a dual-RCA unbalanced stereo input into a mono RDL TP Format-A signal. It offers rear-panel selection of pair A, B, or C, RJ45 signal and power pair pass-through, passive operation, and galvanic isolation through a studio-quality transformer. With documented 20 Hz to 20 kHz response and compatibility with Format-A sender daisy chains, it brings clearly specified audio routing and integration capabilities to compatible twisted-pair systems.