Audio Selector for SourceFlex Distributed Audio System-Black

The RDL® DB-SFRC8L is a black, single-room listening station and audio selector for a SourceFlex distributed audio system. Installed as an in-wall control, it gives room users pushbutton selection from as many as eight audio sources while providing a clear red LED channel indication. The station supplies line-level audio outputs and receives control signaling and 24 Vdc power from the SourceFlex controller. Its combination of source selection, channel display, and line-level output is intended for distributed sound systems carrying music and paging.

Ideal Use Cases

The DB-SFRC8L is ideal for office distributed sound systems in which individual rooms need access to centrally managed music or paging sources. Its compact wall-mounted format makes it suitable wherever a dedicated, accessible source control is required.

• Single-room source selection within a SourceFlex distributed audio system
• Office sound systems providing both music and paging
• Installations requiring selection from as many as eight audio sources
• Rooms that need balanced or unbalanced line-level audio output
• Wall-control layouts using compatible RDL wall plates and controls

Why Choose This Model

Users operate the station through a momentary channel SELECT button. A 7-segment red LED identifies the current state: 1 through 8 indicates the selected audio channel, while 0 represents off or Paging. This focused interface keeps the available information visible without adding controls beyond the required source-selection function.

The listed line outputs support two common nominal operating levels: +4 dBu balanced and -10 dBV unbalanced. This gives the station clearly specified output options within a SourceFlex installation. The audio selector also combines its user control and display functions in an in-wall form designed around standard installation hardware.

Installation and Integration

The DB-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. It is also compatible with other RDL wall plates and controls, supporting coordinated wall-control arrangements.

Connections are made through a 10-position detachable terminal block. The station communicates with the remote SourceFlex controller through dc DISPLAY RAMP and CONTROL conductors. Its power requirement is 24 Vdc at 30 mA, supplied by the SourceFlex controller. These defined control, power, and audio connections place the room station directly within the SourceFlex system architecture.

The specified ambient operating environment is 0°C to 50°C maximum, with 20°C recommended. These conditions should be considered when selecting the installation location.

Performance Highlights

The DB-SFRC8L has a specified frequency response of 20 Hz to 20 kHz with ±0.1 dB variation. THD+N is rated at less than 0.1% across the same 20 Hz to 20 kHz range. Specified noise is below -85 dB, referenced below +4 dBu.

Its two nominal line-output formats cover +4 dBu balanced and -10 dBV unbalanced operation. The red 7-segment display provides immediate confirmation of channel selection, while the momentary SELECT button advances the control function. Together, these specifications define both the station’s audio behavior and its room-facing operation without adding functions not required for source selection.

What Makes It Different

The DB-SFRC8L is more than a standalone pushbutton. It combines selection from up to eight audio sources, numbered status indication, SourceFlex control signaling, and line-level audio output in one in-wall listening station. Its support for a US single-gang electrical box or RDL WB-1U also gives installers two specifically identified mounting approaches.

The black model integrates with compatible RDL wall plates and controls. Its controller-supplied power, detachable terminal-block input, and defined DISPLAY RAMP and CONTROL conductors make its role within the SourceFlex platform explicit.

Final Assessment

The RDL DB-SFRC8L is a purpose-built room control for SourceFlex distributed audio systems. It provides straightforward selection from as many as eight sources, a red numeric display, balanced and unbalanced nominal line outputs, and documented performance from 20 Hz to 20 kHz.

For office music and paging installations that require a compact black in-wall listening station, this model brings source selection, status display, and line-level output together in a single-gang-compatible format.