Check the listing for details. Pro Wire 8 Pair Speaker Selector with Amplifier Protection. Condition: Open box. Listed at 43.12 USD. Product highlights8-zone, single-source speaker selector handles up to 100 watts per channel front-panel on/off switches for each zone amplifier protection switch creates an impedance buffer to help keep your amp working safely Euroblock speaker terminals durable metal chassis 17"W x 2"H x 5-1/4"D weight: 5 lbs. warranty: 1 year What's in the boxSpeaker selector Nine 4-pin euroblock connectors Instructions Warranty/Registration Card About this itemWritten by Crutchfield's Archer A.Whole-home audio control from a single point Pro-Wire's SW-8SPKR passive speaker selector lets you route music through a huge whole-home audio system and turn zones on and off from one convenient spot. Connect and control up to eight pairs of 8-ohm speakers (16 speakers total) simultaneously. Quick-connect Euroblock terminals make connecting your speakers a breeze. Note: To prevent damage to your amplifier, please use the SW-8SPKR with impedance-matching volume controls in each zone.