Technical features Diamond tweeter Solid body Tweeter-on-Top Continuum cone FST™ Anti-Resonance plug Biomimetic Suspension Matrix™ Aerofoil cone bass units Flowport™ Description 3-way vented-box system Drive units 1x ø25mm (1in) diamond dome high-frequency 1x ø130mm (5in) Continuum cone FST midrange 2x ø165mm (6.5in) Aerofoil cone bass units Frequency range 33Hz to 35kHz Frequency response (+/-3dB from reference axis) 45Hz to 28kHz Sensitivity (on axis at 2.