801 D4 802 D4 803 D4 804 D4 805 D4 HTM81 D4 HTM82 D4 Technical features Diamond tweeter Solid body Tweeter-on-Top Continuum™ cone FST Anti-Resonance plug Biomimetic Suspension Turbine™ Head Matrix™ Aerofoil™ cone bass units Flowport Diamond tweeter Solid body Tweeter-on-Top Continuum™ cone FST Anti-Resonance plug Biomimetic Suspension Turbine™ Head Matrix™ Aerofoil™ cone bass units Flowport Diamond tweeter Solid body Tweeter-on-Top Continuum™ cone FST Anti-Resonance plug Biomimetic Suspension Turb