Ultimate Nobelium* 5.2 is a 13 cm (5,25") 2-way system with a solid die-cast basket with aluminium cone.Neodymium magnet system and 3" voice coil. Filter boxes with selectable tweeter level in three steps and only high class components. We use ribbon air coils in the filters. 28 mm silk dome tweeter in metal housing with chamber. Special designed grilles are included.