Russound SDB-4.1 4 Pair Speaker Selector / Dual Source Dual amplifier inputs allow a choice of program in each room Lets you select music and control volume in multiple rooms from a central location Able to output to four speaker pairs simultaneously from a single amplifier Handles 200 Watts RMS Continuous Per Channel Uses high-quality impedance-matching autoformers to maintain a safe operating load at the amplifier while distributing maximum power throughout your system