5 of the best miniature gadgets

ZVEX Nano Head Amplifier £380
No amount of electronic gubbins can properly recreate the sound of valves, but unfortunately valve amps tend to be massive units that run hotter than the sun. Enter the Nano Head guitar amp: plug it in between your axe and speaker and it can generate half a watt of classic rock distortion. It has switches to adjust brightness, bass and roll-off, and there are even built-in mini speakers for quick practices.