Active Single-Pair Receiver-Twisted Pair Format-A-XLR mic/line output-Black

The RDL DB-TPR1A is a black active single-pair receiver designed for RDL Format-A twisted-pair audio systems. It routes a selected Format-A signal pair to a balanced XLR output, with rear-panel switching between mic and line output levels. Signal and power pair pass-through on its RJ45 connections supports continued distribution to additional Format-A receivers, while remote and local powering options provide installation flexibility.

Ideal Use Cases

The DB-TPR1A is suited to Format-A installations in which a single location needs balanced audio from one pair within a multi-pair twisted-pair run. Its selector allows pair A, B, or C to feed the output, making it practical when different receiver locations must access different signals carried by the same Format-A system. The balanced XLR connection provides a 150 Ω output for equipment requiring a conventional mic- or line-level audio feed. RJ45 pass-through also makes the receiver appropriate for layouts that place additional Format-A receivers farther along the signal path.

Why Choose This Model

This receiver combines pair selection, level selection, power distribution, and an active balanced output in one compact module. A rear-panel switch selects mic or line operation, while another switch determines whether Format-A pair A, B, or C reaches the XLR output. The blue power LED gives a visible indication that the module is powered. RDL specifies studio-quality precision active balanced circuitry, supported by detailed frequency-response, distortion, noise, headroom, and common-mode rejection measurements. This DB-TPR1A version has a black finish; the product family is also available in white and stainless steel.

Installation and Integration

The receiver accepts an RDL Format-A input and provides RJ45 signal and power pair pass-through. It can receive power remotely through the twisted-pair cable or from a local 24 Vdc source connected to the detachable terminal block. When local power is used, the fused feed supplies all connected modules. The two listed power connections are the detachable terminal block and RJ45, and the operating requirement is 24 Vdc at 45 mA plus the requirements of connected loads.

The recommended power supplies are the PS-24AS for the USA and the PS-24AX for international use; a power supply is not included. The module measures 1.6 inches wide, 4.11 inches high, and 1.89 inches deep. The listed minimum mounting-box depth for D- and DS-series models is 2.4 inches. Its specified ambient operating range is 0° C to 50° C, providing a clear environmental requirement for installation planning.

Performance Highlights

The DB-TPR1A covers a frequency range of 10 Hz to 50 kHz within ±0.1 dB. THD+N is specified below 0.005%, while noise below a +4 dBu output is less than -90 dB. Available headroom above +4 dBu exceeds 18 dB. Common-mode rejection is greater than 80 dB from 50 Hz to 150 Hz. Together with the 150 Ω balanced XLR output, these figures define the receiver’s performance for accurate active balanced audio transfer. The supplied output-level specification lists 45 dBu Mic or +4 dBu Line Level, selectable from the rear panel.

What Makes It Different

The DB-TPR1A does more than terminate a single twisted-pair signal. It allows the installer to select one of three Format-A pairs, choose the required mic or line output setting, and continue both signal and power to another receiver. Remote powering can reduce the need for a power source at the receiver, while the fused local-power option can feed connected modules when power is available nearby. These capabilities make the unit adaptable without changing the Format-A wiring arrangement or interrupting downstream distribution.

Final Assessment

The RDL DB-TPR1A is a focused interface for converting a selected Format-A pair into a balanced XLR mic- or line-level output. Its A/B/C pair selector, RJ45 pass-through, two powering methods, visible power indication, and compact black enclosure address both signal routing and installation needs. For systems using RDL Format-A distribution, it provides an active receiver with documented wide-band response, low distortion, substantial headroom, and support for daisy-chained receivers.