Mission MV-2 Bookshelf Speakers (Pair, Blackwood Vinyl) Enclosure Type: 2-Way reflex, loaded Frequency Response -6dB: 56Hz - 20kHz Sensitivity SPL/M @ 2.83V: 86dB Impedance: 8 ohms, min. 5 ohms Bass/Mid Unit: 4.5in Enclosure Type: 2-Way reflex, loaded Frequency Response -6dB: 56Hz - 20kHz Sensitivity SPL/M @ 2.83V: 86dB Impedance: 8 ohms, min. 5 ohms Bass/Mid Unit: 115mm