The OPTIBT25 is a 200-watt, die-cast aluminum tweeter from Lanzar that really gets the highs rolling. With a frequency range of 2.5 to 20 kHz, you"ll have the top end covered. With a 1" high-temperature Kapton voice coil and Neodymium magnet it provides rich, sweet highs. The die-cast aluminum frame was designed to provide competition grade performance highs.