Mission MV-4 Bookshelf Speakers (Pair, Blackwood Vinyl) (Discontinued by Manufacturer) Enclosure Type: 2-Way reflex, loaded Frequency Response -6dB: 45Hz - 20kHz Sensitivity SPL/M @ 2.83V: 88dB Impedance: 8 ohms, min. 5 ohms Bass/Mid Unit: 5.9in Enclosure Type: 2-Way reflex, loaded Frequency Response -6dB: 45Hz - 20kHz Sensitivity SPL/M @ 2.83V: 88dB Impedance: 8 ohms, min. 5 ohms Bass/Mid Unit: 150mm