Great speakers at this pice. Sound fantastic! Specs - Nominal Impedance: 8ohms. Efficiency: 98db @ 1 watt / 1 meter. Crossover Frequency: 2800Hz. Frequency Response: 42Hz-27kHz (72Hz-25kHz +/- 3db). SM 82 Introduced in 1991-1994. Original MSRP $438.00/pair Each cabinet measures: 18" High x 11.25" Wide x 11" Deep (heavy, solid build quality)