MartinLogan Motion 4 Home Audio Speaker Single Type: Bookshelf Speakers Driver Units: High Frequency Driver: 1 x 1.4 (2.6 x 3.6cm) Folded Motion Transducer with 5.25 x 1.75 (13.3 x 4.4cm) diaphragm. Mid/Low Frequency Drivers: 4 (10.2cm) paper cone. Power Rating: 75 watts Frequency Response: 70–25,000 Hz ± 3dB Nominal Impedance: 4 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers. Sensitivity: 90 dB/2.83 volts/meter Connectors: Yes |