This compact switch allows for two pairs of speakers to be connected to an amplifier, with the ability to select either pair or both together. This can be a quick solution for the zoning of a sound system or for adding extra speakers to a single amp. With two pairs of 8 Ohm speakers connected, the impedance will be 8 Ohms per channel with either pair enabled or with no speakers switched on. When both channels are enabled, the speakers are linked in series and the impedance will be 16 Ohms.Power per channel[tab]50W max.[br]Dimensions[tab]170 x 47 x 117mm[br]Weight[tab]324g