Passive Single-Pair Sender-Twisted Pair Format-A-Mini-Jack Input-Stainless

Ideal Use Cases

The RDL DS-TPS7A is designed for an RDL TP Format-A system that needs to accept an unbalanced stereo source through a 3.5mm mini-jack and distribute it as a mono signal. Its rear-panel selector routes that signal to Format-A pair A, B, or C, allowing the sender to occupy the appropriate pair within an existing twisted-pair audio installation.

This model is particularly suited to systems that need to add a mini-jack source without interrupting the other signal and power pairs carried between TP CABLE RJ45 connections. It can also be daisy-chained with single-pair or two-pair Format-A senders, making it useful when several compatible senders must share the available pairs in a structured installation.

Why Choose This Model

The DS-TPS7A combines stereo-to-mono input conversion, selectable pair assignment, RJ45 pass-through, and transformer-based galvanic isolation in one compact passive device. Because its circuitry does not require power, there is no separate power supply, power outlet, or voltage connection to accommodate at the sender location.

A rear-panel switch selects whether pair A, B, or C receives the audio signal. This defined routing method gives the installer direct control over pair usage while the signal and power pairs continue through the two TP CABLE RJ45 jacks. The result is a focused Format-A component that can be integrated without consuming every available pair.

Installation and Integration

Connect the unbalanced stereo source to the 3.5mm mini-jack input, then use the rear-panel switch to select Format-A pair A, B, or C. The stereo input is combined to mono before being placed on the selected pair. The Format-A input uses an RJ45 TP CABLE connection, and the output is an RJ45 TP CABLE connection carrying RDL TP Format-A.

The pass-through arrangement allows signal and power pairs to continue between the RJ45 jacks. This supports daisy-chain configurations with compatible single-pair or two-pair Format-A senders. The passive design simplifies placement because no local power connection is required. The unit measures 1.6 inches wide by 4.11 inches high by 1.89 inches deep, or 4.06 by 10.45 by 4.8 cm.

Performance Highlights

The DS-TPS7A provides a specified frequency response of 20 Hz to 20 kHz within ±0.5 dB. Total harmonic distortion is specified at less than 0.1% from 50 Hz to 20 kHz and less than 0.001% at 1 kHz typical. The listed input level is 10 dBV with a maximum level of +22 dBu.

Galvanic isolation is provided through a studio-quality transformer. This transformer-isolated signal path is a defining part of the product’s passive circuitry and does not depend on an external power source. The input remains specifically configured for unbalanced stereo audio, while the transmitted Format-A output is mono.

What Makes It Different

The distinguishing feature of this model is the combination of selectable single-pair routing and pair pass-through. Instead of fixing the source to one Format-A pair, the DS-TPS7A lets the installer choose A, B, or C from the rear panel. The remaining signal and power pair capacity can pass between the RJ45 TP CABLE jacks for use elsewhere in the compatible system.

It also handles the conversion required at the source connection: a stereo input arrives through a familiar 3.5mm mini-jack and is combined into a mono output for RDL TP Format-A distribution. Passive operation, transformer isolation, and support for daisy-chaining are brought together in a stainless model with compact dimensions.

Final Assessment

The RDL DS-TPS7A is a purpose-specific sender for adding a 3.5mm unbalanced stereo source to an RDL TP Format-A installation as mono audio. Its selectable A, B, or C pair routing, signal and power pair pass-through, passive operation, and galvanic isolation address the essential integration requirements documented for this model. It is the appropriate choice when those Format-A functions are needed in a compact sender that can operate without a separate power connection.