LONG STROKE - DOUBLE MAGNET Vented cast aluminium chassis for optimum strength and low compression. Unique mineral filled polypropylene cone material, made in-house with extra stiffness. Extended roll rubber surround for improved transient response and SPL. Non-conducting fibre glass CCAW voice coil former. Long life silver lead wires. Vented pole piece and aluminium chassis. Optimised for compact enclosures. Long stroke design Linear high stability suspension Low damping rubber surround Long copper voice coil Non-conducting reinforced fibre glass coil former Very stiff mineral filled Polypropylene cone Vented cast aluminium chassis Large vented motor system Long life silver lead wires Optimized for smaller enclosures