Marantz imperial model 4 mkii speakers Good condition, all original, woofers refoamed.....rare classics!!! Type: 2 way, 2 driver loudspeaker system Frequency Response: 50Hz to 18kHz Sensitivity: 88dB Crossover frequency: 3500Hz Impedance: 8Ω Dimensions: 286 x 486 x 210 mm Weight: Year: 1978