Product reviews:
Russound - SDB-2.1 2 Pair, Dual Source russound 4 pair speaker selector
russound 4 pair speaker selector
Russound PRO-8 HP 8 Pair Impedance russound 4 pair speaker selector
russound 4 pair speaker selector
Russound SS-4 4-Pair Single-Source russound 4 pair speaker selector
russound 4 pair speaker selector