Infinity CASCADE MODEL 7 7-3/4 inch x 3-3/8 inch Flat-Panel Driver 2-way Floorstanding Loudspeaker (Cherry) 1.pcs The Infinity Cascade; Model Seven floorstanding loudspeaker utilizes the patent-pending Maximum Radiating Surface (MRS) flat-panel driver with Ceramic Metal Matrix Diaphragms (CMMD) and a 1 inch CMMD tweeter mounted in Infinity's proprietary Constant Acoustic Impedance; (CAI;) waveguide to deliver uncompromising sonic performance from a strikingly beautiful loudspeaker. The Cascade Model Seven is magnetically shielded and available in a choice of real-wood cherry veneer finish. SpecificationsGeneral SpecificationsFinish: Real-Wood Cherry VeneerTechnology CMMDMRS Driver Frequency Response 100Hz – 20kHz (±3dB) Frequency Response 92Hz – 40kHz (-6dB) Recommended Amplifier Power (RMS) 10 – 100 Watts Sensitivity (2.83 volts @ 1 meter) 85dB Nominal Impedance 8 ohms Crossover Frequency(ies) 1,800Hz; 24dB/Octave Low-Frequency Transducer (Woofer) 7-3/4 inch x 3-3/8 inch (197mm x 85mm) CMMD, magnetically shielded High-Frequency Transducer (Tweeter) 1 inch (25mm) CMMD DimensionsWeight 24.7 lb (11.2kg) Dimensions (H x W x D) 47 inch x 10-1/2 inch x 11-1/2 inch (1194mm x 267mm x 292mm)