Aerodynamic cast aluminium frame also acts as a heatsink. Sculpted design promotes cooling and reduces reflections. High-strength compact neodymium iron boron motor assembly. Coated natural wood fibre cone with half-roll rubber surround. Pentacone cone technology for improved frequency response. Long-throw voice coil on a 51mm diameter titanium former. Copper pole piece cap for extended HF response and lowered back EMF.