Attributes . 6 pcs, 165 mm (6.5 in) drivers, lightweight neodymium motors, 50 mm (2.0 in) diameter voice coils, copper-capped pole tips to minimize flux modulation and linearize inductance, 16 mm (0.63 in) long coil for high linear drive and high power handling, damped blended textile surround, coated cones for moisture, UV and salt resistance. Magnetically shielded. . Names