2 Years Local Warranty. An opening experience. Innovative, uncompromising approach to achieve the best possible music reproduction. Silver Diaphragm Technology Looking at conductor materials, and considering both specific conductivity and specific weight, Silver proved to be the clear winner. Our ultra-thin 1.5 μm diaphragms deliver unprecedented bandwidth exceeding 50 kHz. Diaphragm Thickness: < 1.5 μm Bandwidth: > 50 kHz Conductor: Pure Silver Free rear sound radiation AB stands for "AirBorne" — literally floating in the air, free from reflections. The completely open design prevents any colouration from rear-radiated sound bouncing back to the membrane. Design: Fully Open Reflections: Eliminated Soundstage: Natural 3D Precision Engineering Milled aluminium rings of exceptional stiffness, carefully damped to eliminate ringing. Black anodised and glass pearl blasted for lasting beauty and acoustic neutrality. Material: Milled Aluminium Finish: Black Anodised Damping: Acoustically Inert Why Silver? 6.30×10⁷ S/m Conductivity Highest of any metal 10.49 g/cm³ Density Optimal power-to-weight 99.99% Purity Electrochemical deposition < 1.5 μm Thickness Ultra-thin conductor Technical Specifications Frequency Response: 5 Hz – 46 kHz Sensitivity: 90 dB SPL/mW (105 dB/1V) Impedance: 33 Ω Weight: 540 g THD @ 94 dB SPL: < 1% Diaphragm Thickness: < 1.5 μm Conductor Material: Pure Silver