Monoprice 38157 Speaker Selector - SS 4 Premium 4 Channel Amplifier, Receiver Compatible

The SS-4 Speaker Selector is a resistor-based, impedance matching speaker selector used for connecting up to four pairs of 4-ohm or 8-ohm speakers, while maintaining a safe impedance load for your amplifier or receiver. Each pair of speakers can be independently turned on or off using push buttons on the front panel, with no need for worrying about amplifier loading.