IT (Qmsk 10355 8946 Total Speaker V" (Otsk 0.759 0.460 Equivalent Compliance (Vas): 1.16 ft3 /32.85 litres 1.58 ft3 / 44.75 litres One-way, Linear Excursion (Xmax)•: 0.52 in/ 13.2 mm 0.52 in./ 132mm Efficiency (1W/1m)•e: 86.808 SPI. 86.7 dB SPI. Effective Piston Area Mk 50.11 in2/0.0323 m2 50.11 in2/