Fmax tweeter with 25 mm cloth dome and special-damping for an advanced dynamic and frequency range, SACD and DVD Audio Stable MDF cabinet with complex strutting and low resonant 22 mm baffle Woofer/midrange with `deep-space`-technology, stiffe and light alu cone Voice coil ventilation for high capacity New developed eliptic formed “Air flex” por ts for optimized bass Removable metal cover Large terminal with golden connectors Resonance damping rubber spikes included Magnetically shielded