Disinformation’s National Grid is a sub-bass installation sourced either from the ambient Very Low Frequency (VLF) radio field radiated by electricity pylons and mains circuits, or directly from the output cables of mains transformers. The long wavelengths associated with these frequencies interact with and articulate acoustically live exhibition space, producing pronounced and dramatic standing waves, equivalent to stationary pond-ripples. Audience members interact with and play these sounds, by the simple act of exploring the auditory space.