20Hz is the lowest thing we hear. If loud enough, its vibration moves our eardrums and everything else with it. This Barossa shiraz has an undertow carrying spice with clarity and strength, turning aromas into heat waves, and forcing tannin inexorably through your constitution like you’re some kind of ghost. Pings and pangs and bangs and warbles of all colours and shades, underwritten and vouchsafed by that 20Hz rumble.