A passive amplifier product design project designed for S1. Pupils are given three identical pieces of plywood that they sandwich together, the centre piece is cut specifically for their mobile phone to slot into, the front and centre are then bored using a Hole Cutter for the sound to amplify, then slots cut to join the bores to the mobile phone speakers.

Pupils conduct primary research on a selection of pre-made amplifiers, come up with an initial idea, research the relevant sizes of a mobile phone, use 3D CAD modelling software to develop that idea and then manufacture and test their design.