The MA770 Wireless Speaker from Master & Dynamic is 16kg of monolithic audio brilliance. Made in collaboration with renowned architect Sir David Adjaye, the geometric slab is cast in composite concrete which not only makes it a thing of beauty, but also offers five times the dampening properties of wood. Inside there’s a 100 watt Class D amplifier, dual 4″ woven Kevlar woofers and a 1.5″ titanium tweeter with diamond cut anodized aluminum controls. It can be used as a single unit, stereo pair or multi room setup via the built-in Chromecast link as well as Bluetooth 4.1 and wired options.