LS28: West German silk sound film, 28-mm voice coil, Neodymium magnet.
LS90: Japan 3k carbon fiber + damping coating vibration cone, 25 mm voice coil, strong Neodymium magnet.
LS165: It is also driven by Japanese 3k carbon fiber + special damping coating vibration cone, 38mm large voice coil, and super strong Neodymium
magnetic circuit.