Monoprice 138159 4-Channel Speaker Selector

The Monoprice 138159 SSVC-4.1 Speaker Selector is a practical solution for distributing audio from a single stereo amplifier to up to four pairs of speakers in different zones. Each zone features its own on/off toggle and rotary volume control, giving you room-by-room command over your audio without needing to return to the amplifier. The built-in automatic impedance protection circuitry is a key feature, ensuring that even when all four speaker pairs are active, the combined load stays within a safe range for your amplifier — preventing overheating and potential damage that can occur with unprotected multi-speaker setups.

Designed with heavy-duty screw-type terminals that accept 12 to 18 AWG speaker wire, the SSVC-4.1 provides secure and reliable connections for both the amplifier input and all speaker outputs. The isolated left and right circuit grounds are a thoughtful inclusion that makes this unit compatible with amplifiers using bridged outputs or floating ground configurations — a detail that cheaper selectors often overlook. With 100 watts per channel continuous power handling and 200 watts peak, this selector comfortably supports the majority of home audio amplifiers. Its purely passive design means it requires no power supply and introduces no electronic noise into your signal chain, keeping your audio clean from source to speaker.