A mid-high end midrange speaker for active 3-way systems. Pairs well with the AE650C 2-way speaker set, but can really be used with any high-end components for a full 3-way active system. Aluminum cones, die-cast free breathing aluminum baskets, neodymium magnets, screw-type wire terminals, included grilles with black anodized aluminum base and steel mesh. Manufacturer provided specs: Rated power input: 30 W Frequency response: 100-20000 Hz DC Impedance: 3.6 Ohm Sensitivity: 88 dB Qms: 3.9 Qes: 0.53 Qts: 0.46 Mms: 2.9 g Vas: 0.21 L Weight: 235 g Mounting depth: 42 mm Mounting diameter: 86 mm Our own DATS3 measurements: Right out of the box, no run-in, Vas measured with the added mass method with a 4g added weight. Re: 3.242 Ohm Fs: 109.9 Hz Qts: 0.5143 Qes: 0.5725 Qms: 5.068 Le: 0.06662 mH Mms: 2.919 g Vas: 0.8064 L Sensitivity: 88.54 dB @2.83 Vrms BL: 3.379 Cms: 0.718 mm/N What's included: 2x Midrange speakers 2x Black anodized aluminum mounting rings 2x Hexagonal pattern protective grilles 1x Instructions