The Russound SS-4.2 speaker selectors allow four pairs of speakers or six pairs of speakers with an SS-6.2 to be turned on and off through individual switches on the front panel, it also provides overload protection and long-term reliability.

Multiple pairs may be engaged simultaneously if desired. When multiple pairs are engaged, impedance matching protection must be employed to protect the amplifier from damage. The SS-4.2 have this impedance matching protection built in, when selected by the Impedance switch on the rear panel.

This new Russound AB-3.2 automatic A/B selector switch is designed to provide automatic switching of two amplified audio sources to a single set of speakers. For example, connect the speaker output of a TV, the speaker output of a stereo receiver, and a pair of speakers to the AB-3.2. The “AMP B” input has priority when both audio signals are present. If you are listening to the stereo on the “AMP A” input, then turn on the TV, connected to the “AMP B” input, the AB-3.2 will disconnect the stereo and allow the TV to play through the speakers