- Rohacellﾮ/Carbon fibre sandwich cone for optimized stiffness/damping ratio - Vented cast aluminum chassis for optimum strength and low compression - 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