Russound SDB-4.1

This factory refurbished version of Russound's SDB-4.1 speaker selector saves you some money, and it comes complete with a two-year factory warranty. It's a convenient way to distribute signals to four pairs of speakers from one location. This speaker selector lets you independently select and adjust the volume for each set of speakers — a necessity for most multi-room systems. This versatile design also allows you to switch between two source amplifiers or receivers. The impedance can be customized to match your specific combination of speakers and sources.