SB ACOUSTICS Hard paper cone for improved piston operation (made in-house). Large optimized motor system with under-cut pole piece and dual shorting rings. Vented aerodynamic cast aluminium chassis for optimum strength and low compression. Soft low damping rubber surround for optimum transient response. Linear symmetric suspension design for improved dynamic performance. Non-conducting fibre glass voice coil former for minimum damping. Long life silver lead wires attached 180° apart for improved stability. Vented pole piece for reduced compression. High piston to chassis diameter ratio. Gasket and bolt hole protrusions for reduced coupling to speaker cabinet. Hard paper cone for improved piston operation (made in-house) Large optimized motor system with under-cut pole piece and dual shorting rings Vented aerodynamic cast aluminium chassis for optimum strength and low compression Soft low damping rubber surround for optimum transient response Linear symmetric suspension design for improved dynamic performance Non-conducting fibre glass voice coil former for minimum damping Long life silver lead wires attached 180° apart for improved stability Vented pole piece for reduced compression High piston to chassis diameter ratio Gasket and bolt hole protrusions for reduced coupling to speaker cabinet