specs: diameter: 165 mm endurance: 70 w rms/210 w max impedance: 4 ohm frequency range: 60 hz - 5khz conversion efficiency: 93.5 db/spl outside diameter: 165 mm mounting diameter: 142 mm coil diameter: 25 mm total depth: 70 mm installation depth: 64 mm weight: 0.96 kg per piece parameters: d: 134 mm xmax: 3 mm rg: 3.1 ohm fs: 70 hz le: 0.18 mh vas: 10.4 l mms: 13.7 g cms: 0.37 mm/n bl: t·m 5 qts: 0.61 qes: 0.76 qms: 3.2 spl: 93.5 db included: 2 pcs