Wide-wave spider profile, for high mechanical resistance against impulsive stresses; its resin-bonded fibre ensures consistent electro-acoustic parameters in time., V-coneR technology with water-repellent paper membrane, for reduced moving assembly mass and increased sensitivity., . High density foam surround, for extreme mechanical and acoustical linearity, even under high excursion., Copper voice coil wound on aluminium former, combined with the spider support cooling system and bottom plate vent holes, for outstanding thermal capacity in power peaks., Silver plated silicone shielded lead wires ending with tin-plated, high current terminals for high resistance against mechanical stress and low contact resistance.