NEODYMIUM-IRON-BORON MAGNET The Vifa NE product line has leading-edge transducer technology packaged in a cutting edge, stylistic design. The basket also is designed to act as a highly coupled heat sink to the Neodymium-Iron- Boron magnet (NdFeB) motor, so as to improve power handling capacity. The cone is aluminium, with a butyl rubber surround designed through finite element analysis for linearity of performance. Wide range or mid driver.