The Scan-speak D2905/9500 is similar to the D2905/9300, but with non-resonant chamber. The optimized pole piece geometry reduces flow resistance and the anti-resonator-plug in the rear chamber eliminates turbulence. A light ferrofluid is used in the air gap to ensure optimal linear mechanical behavior and minimal micro-dynamic non-linearity. This tweeter has a smooth transparent sound and very low levels of distortion. A perfect choice for any high end system. TECHNICAL DATA: Sensitivity 2.83V/1M 90dB  Free air resonance Fs 550 Hz DC resistance 4.7 ohm V.C. inductance 0.08 mH Power 12dB@Hz 150W@2.5K Effective cone area 8.5 cm2 V.C. diameter 28 mm V.C. height - Air gap height - Lin. & max. excursion ±0.4 / ±1.5 mm Air gap flux density - Force factor BL Product 3.5 Tm Moving mass incl. air 0.45 g Net weight 0.7 kg Outside diameter: 104.5mm Cut out: 74mm Depth: 41mm 25.4mm = 1" = 2.54cm

ScanSpeak D2905/9500 28 mm Textile Dome Tweeter