Mission m31i Bookshelf Speakers - Cherry - Designed to be used on a shelf or stand-mounted using Mission's Stancette Stand, the m31 is a superb loudspeaker of compact dimensions.Nominal Impedance 8 Ohm (min. 4Ohms) Amplifier power 25 - 75W/Ch Dimensions (HxWxD) 255 x 170 x 280(mm) Weight (per cabi and more Home HiFi Systems