Room Control Station for SourceFlex Distributed Audio System-SS

Ideal Use Cases

The RDL DS-SFRC8 is designed as a single-room listening station for office distributed sound systems carrying music and paging through a SourceFlex controller. It gives an individual room in-wall source selection and volume adjustment. A user can select from up to eight audio sources with the front-panel pushbutton, view the active channel on the red LED display, and set the listening level with the single-turn control.

The station supports systems requiring both local loudspeaker amplification and line-level audio. Its integrated amplifier delivers up to 3.5 W RMS into 8 ohms or 6.5 W RMS into 4 ohms. The line output can be switched between fixed and variable operation, with the variable setting following the front-panel level control.

Why Choose This Model

The DS-SFRC8 combines source selection, room-level adjustment, line-level output, and speaker amplification in one wall-mounted control. Its seven-segment red LED provides an immediate source indication: 0 represents off or Paging, while numbers 1 through 8 identify the selected channel. A momentary SELECT button handles channel changes, and a front-panel single-turn audio-taper control manages gain.

• Selects from as many as eight SourceFlex audio sources.
• Provides two nominal line outputs for balanced or unbalanced audio connections.
• Includes a high-efficiency Class D amplifier with thermal and short-circuit protection.
• Supports local control through its variable line-output mode.

Installation and Integration

The station mounts in a wall using a US single-gang electrical box or an RDL WB-1U and is compatible with other RDL wall plates and controls. Its input uses a 10-position detachable terminal block, while the speaker output also connects through a detachable terminal block. Control signals are dc and travel over the DISPLAY RAMP and CONTROL conductors between the remote listening station and the SourceFlex controller.

Operating power is supplied by the SourceFlex controller at 24 Vdc. Current requirements are 30 mA while idle, 55 mA at one-eighth power during normal voice or music operation, and 225 mA when producing 3.5 W into 8 ohms. The wall station measures 4.13 inches high, 1.7 inches wide, and 2.05 inches deep. Its specified ambient operating range is 0 to 40 degrees C maximum, with 20 degrees C recommended.

Performance Highlights

At line level, the DS-SFRC8 has a specified frequency response of 20 Hz to 20 kHz within plus or minus 0.1 dB. Its speaker path covers 40 Hz to 20 kHz within plus or minus 1 dB. Line-level THD+N is below 0.1 percent from 20 Hz to 20 kHz, while speaker THD+N is below 0.25 percent at 1 kHz.

Specified line-level noise is below -85 dB relative to +4 dBu. Speaker-path noise is below -80 dB relative to 1 W RMS. The two line outputs are rated at nominal +4 dBu balanced and -10 dBV unbalanced levels. For direct speaker operation, the Class D amplifier supplies a maximum of 3.5 W RMS into an 8-ohm load or 6.5 W RMS into a 4-ohm load.

What Makes It Different

The defining feature of this model is the combination of eight-source room control and multiple audio-output options. The switchable fixed or variable line output allows the installation to retain a constant line level or have the output track the front-panel volume setting. At the same time, the integrated amplifier can power a compatible 4-ohm or 8-ohm speaker load. The numbered LED source display also distinguishes normal channel selection from the 0 state used for off or Paging.

Detachable terminal-block connections, single-gang wall mounting, and compatibility with other RDL wall plates and controls position the DS-SFRC8 specifically for integration within an RDL SourceFlex distributed audio installation.

Final Assessment

The RDL DS-SFRC8 is a focused room-control solution for SourceFlex office audio systems that distribute music and paging. It provides concrete local functions: selection from up to eight sources, visible channel identification, front-panel level adjustment, fixed or variable line output, and Class D speaker amplification. For installations requiring an in-wall listening station powered directly by a SourceFlex controller, it brings the specified control, line-output, and amplified-output functions into one single-gang format.