Boston Acoustics Horizon Series MCS100 System Mist Speakers Includes - 4x Satellite speakers, 1 Center Channel speaker, 1 Subwoofer, 2x 40' (12m) speaker wires, 3x 15' (4.6m) speaker wires, 1x 15' (4.6m) subwoofer cable, 8x Rubber bumpers (used for wall mounting), and 1x Center Channel speaker with 2 removable feet Recommended Amplifier Power Range - 10 - 100 watts Sensitivity - 88dB [2.8v at 1m] Nominal Impedance - 8 ohms Crossover Frequency - 3,000Hz