6.5" neodymium magnet woofer providing 150Wrms (AES standard) power handling and 90dB sensitivity 1.75" high temperature copper clad aluminium voice coil Optimized flux distribution in magnet assembly provides low harmonic distortion Half-roll elastomer surround provides greater excursion and improved modal distribution Intelligent heat management in both chassis and magnet assembly design offers reduced thermal compression Copper sleeved pole reduces inductive rise for improved HF performance Space efficient chassis profile