Audio Selector for SourceFlex Distributed Audio System-SS

The RDL DS-SFRC8L is a single-room listening station for a SourceFlex distributed audio system. Its in-wall interface gives users pushbutton access to as many as eight audio sources while providing two line-level outputs. A red 7-segment LED identifies the selected channel, making this model a compact control point for distributed music and paging systems.

Ideal Use Cases

The DS-SFRC8L is designed for office distributed sound systems that combine music and paging. It is suited to rooms where occupants need local source selection without placing a larger controller at the listening position. The front-panel momentary SELECT button steps through the available sources, while the display shows channels 1 through 8. A display value of 0 indicates that the system is off or operating in Paging mode.

Its wall-mounted format is also appropriate when controls need to remain accessible without occupying desk, shelf, or equipment-rack space. Compatibility with other RDL wall plates and controls allows it to be incorporated into a coordinated in-wall control arrangement.

Why Choose This Model

This listening station combines source selection, channel indication, control signaling, and line-level audio output in one wall-mounted device. It supports selection from up to eight audio sources and provides two nominal output formats: +4 dBu balanced and -10 dBV unbalanced. This gives an integrator access to balanced and unbalanced line-level signals using the specified output connections.

The red LED display provides direct visual confirmation of the operating state. Rather than relying on an unlabeled sequence of button presses, the user can see the active channel number or recognize the 0 indication associated with off or Paging operation.

Installation and Integration

The DS-SFRC8L mounts in a wall using a US single-gang electrical box or an RDL WB-1U. Its dimensions are 4.13 inches high, 1.7 inches wide, and 2.05 inches deep, equivalent to 10.49 by 4.32 by 5.21 centimeters. The input connection is a 10-position detachable terminal block.

Control communication uses DC DISPLAY RAMP and CONTROL conductors between the remote listening station and the SourceFlex controller. The unit requires 24 Vdc at 30 mA, supplied by the SourceFlex controller. These requirements should be considered when planning cabling, wall-box depth, controller connections, and the placement of compatible RDL wall plates or controls.

Performance Highlights

The specified frequency response is 20 Hz to 20 kHz with a tolerance of ±0.1 dB. THD+N is less than 0.1% across the 20 Hz to 20 kHz range, while the noise specification is less than -85 dB below +4 dBu. These published values define the station’s line-level audio performance across the stated audible-frequency range.

Two line outputs are provided, with nominal levels of +4 dBu balanced and -10 dBV unbalanced. The channel selector is a momentary SELECT button, and the red 7-segment display reports the chosen source. The specified ambient operating environment is 0° C to 50° C maximum, with 20° C recommended.

What Makes It Different

The DS-SFRC8L is more than a basic wall-mounted source button. It combines selection for as many as eight sources with a numbered status display and two line-output formats. The 0 display state also communicates off or Paging operation, which is especially relevant to the office music-and-paging applications identified for this model.

Its dedicated SourceFlex control conductors and controller-supplied power establish it as an integrated remote listening station within the SourceFlex system. Support for a standard US single-gang electrical box or the RDL WB-1U provides two documented mounting options, while compatibility with other RDL wall plates and controls supports coordinated installations.

Final Assessment

The RDL DS-SFRC8L is a focused choice for a SourceFlex installation requiring in-wall, single-room selection from up to eight audio sources. Its red channel display, balanced and unbalanced line outputs, specified 20 Hz to 20 kHz performance, compact single-gang form, and controller-supplied power make its intended role clear: local source control for distributed music and paging systems.