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SDB-2.1 2-Source 2-Pair Speaker Selector: Zone Volume Control
SDB-2.1 2-Source 2-Pair Speaker Selector: Zone Volume Control

Russound SDB-2.1 Two-Source Two-Pair Speaker Selector: Zone Volume Control

The SDB-2.1 is a highly efficient dual-source speaker selector that controls two pairs of speakers. The front panel provides a separate volume control for each speaker pair, allowing you to adjust the volume in each room from one convenient location.

With two amplifier inputs, the SDB-2.1 allows you to choose a separate program in each room. Each zone also has an on/off switch, which allows you to keep the volume control at a set level while turning the speakers on or off.

The SDB-2.1 uses high-quality impedance-matching autoformers to maintain a safe operating load at the amplifier while distributing maximum power throughout your system. Designed for use with either 4- or 8-ohm speakers, the SDB-2.1 is equipped with internal jumpers to select the degree of impedance matching based on the impedance of your speakers and your amplifier's impedance requirements.


  • Convenient: Lets you select music and control volume in two rooms from a central location
  • Personal: Dual amplifier inputs allow a choice of program in each room
  • Customizable: Printed room labels included
  • Easy: Detachable snap connectors are color coded for easy wire termination
  • Flexible: Selectable impedance matching accommodates 4- or 8-ohm speakers
  • Robust: High-quality autoformers provide trouble-free performance for years


  • Zone controls:
    – Volume knob
    – On/off switch
    – Amplifier A/B switch
  • Volume adjustment: 12 steps; total attenuation 42 dB
  • Power handling: 100 watts RMS continuous per channel
  • Minimum speaker impedance: 4 ohms
  • Impedance matching type: Autoformer
  • Amplifier and speaker connectors: Detachable 4-pole color-coded snap connectors
  • Maximum wire size: 14 AWG (1.9 mm)
  • Dimensions: 8.5" W x 3.0" H x 6.25" D (21.6 x 7.6 x 15.9 cm)
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Price: $163.05
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