ALUMINIUM CHASSIS - ALUMINIUM CONE BLACK Vented cast aluminium chassis for optimum strength and low compression. Geometrically reinforced aluminium cone for optimum piston operation and reduced break-up. Soft low damping rubber surround for improved transient response. Non-conducting fibre glass voice coil former for minimum damping. Extended copper sleeve on pole piece for low inductance and low distortion. CCAW voice coil for reduced moving mass. Long life silver lead wires. Vented pole piece for reduced compression. Vented cast aluminium chassis for optimum strength and low compression Geometrically reinforced aluminium cone for optimum piston operation and reduced break-up Soft low damping rubber surround for improved transient response Non-conducting fibre glass voice coil former for minimum damping Extended copper sleeve on pole piece for low inductance and low distortion CCAW voice coil for reduced moving mass Long life silver lead wires Vented pole piece for reduced compression