Active Two-Pair Sender-Twisted Pair Format-A-XLR microphone & stereo Mini-jack in-Black

Ideal Use Cases

The RDL DB-TPS2AM is an active two-pair sender for installed audio systems that require both microphone and stereo mini-jack inputs in an RDL TP Format-A configuration. Its balanced XLR microphone input is assigned to Format-A pair A, while the left and right unbalanced line inputs are summed to mono and assigned to pair B. This makes the unit suitable for an input location where microphone and line-level audio need to share one Format-A connection while remaining on separate signal pairs.

Why Choose This Model

The DB-TPS2AM combines three audio inputs with a compact black panel format. The microphone input has a 1.2 kΩ balanced impedance and supports IEC 24 Vdc phantom power. The 10 kΩ unbalanced line inputs are presented through a single stereo mini-jack. Microphone gain is switch-selectable on the rear panel, providing 50 dB in NORM mode or 63 dB in HIGH mode. The line section provides 12 dB of gain.

This input arrangement supports balanced microphone signals from -45 to -65 dBu. Maximum microphone input is -40 dBu in HIGH gain mode and -28 dBu in NORM gain mode. The line input is rated for -10 dBV nominal operation with a maximum level of +8 dBV.

Installation and Integration

The sender provides an RDL TP Format-A output through an RJ45 connection. Power can be connected through either the detachable terminal block or the RJ45 power connection. The specified requirement is 24 Vdc at 65 mA plus any connected loads. Recommended power supplies, which are not included, are the PS-24AS for the USA and the PS-24AX for international use. A Power In indicator provides confirmation that power is present.

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 centimeters. Installation requires a mounting box with a minimum depth of 2.4 inches, or 6.1 centimeters. Its specified ambient operating range is 0°C to 55°C. Front and rear panel diagrams, CAD files, and a specification-sheet PDF are identified in the available product data.

Performance Highlights

The microphone path has a frequency response of 100 Hz to 30 kHz within ±1 dB. An integral low-cut filter is specified at -10 dB at 30 Hz. The line path extends from 20 Hz to 50 kHz within ±0.5 dB. Microphone THD+N is less than 0.1% from 80 Hz to 20 kHz, while line THD+N is less than 0.05% from 20 Hz to 50 kHz.

Noise below +4 dBu is specified at less than -80 dB for the microphone input in NORM gain and less than -70 dB in HIGH gain. The line path is specified at less than -95 dB. Headroom above +4 dBu exceeds 18 dB. Microphone common-mode rejection is greater than 60 dB in HIGH gain and greater than 65 dB in NORM gain from 50 Hz to 150 Hz.

Specified crosstalk includes line-to-line figures below 90 dB at 1 kHz and below 75 dB from 20 Hz to 20 kHz. Line-to-microphone crosstalk in HIGH gain is below 65 dB at 1 kHz and below 60 dB across 20 Hz to 20 kHz. In NORM gain, the corresponding figures are below 75 dB and below 70 dB.

What Makes It Different

The defining feature of the DB-TPS2AM is its allocation of two different input types across two Format-A signal pairs. The balanced microphone remains on pair A, while both channels from the stereo mini-jack are combined into a mono signal on pair B. The integrated phantom-power capability and selectable microphone gain allow the microphone section to accommodate the specified input range without requiring a separate gain setting device.

Final Assessment

The RDL DB-TPS2AM provides a clearly defined solution for placing one balanced microphone input and one stereo mini-jack source onto an RDL TP Format-A output. Its RJ45 output, dual power-connection options, phantom-powered microphone input, selectable gain, compact dimensions, and documented audio performance make it a focused choice for compatible twisted-pair audio installations. A suitable 24 Vdc power supply must be obtained separately.