Herm, good guess. The reason that the speaker magnet is so small is that it uses a neodymium magnet, which Nissan has been using for years in their upgrade systems. Here is a link to Eminence neodymium magnet speakers, a high-end manufacturer that has made them for years. In fact, this is what their FAQ has to say about neodymium magnet speakers:Herm wrote:I just noticed the small magnets in the factory speakers.. are they using rare earth magnets to keep the weight down?
BTW.. I just love that dark metallic red Nissan uses..
Each material, of course, has different magnetic properties and cost. Neodymium seems to be the wave of the future, especially with reduced weight and overall costs coming down. It produces the most magnetic flux per ounce, making it ideal for use in multiple speaker cabinets to maintain performance while reducing handling and shipping weight.
The reason Nissan uses these speakers in the LEAF is to minimize weight while offering reasonable sound. For most, the standard speakers will be fine. If you are used to a more powerful system, you may wish for more power as well as more capable speakers. Just swapping speakers out may not do the trick.