ModelBrand: Polk Audio Model: Monitor70 Series II SpecType: Floorstanding Speakers Sold As: Each Driver Units: Tweeter Complement: one 1" cloth dome Driver Complement: four 6.5" Bi-Laminate driver Power Rating: 20-275W Frequency Response: 30Hz-25kHz Nominal Impedance: 8 Ohm Sensitivity: 90db Connectors: Inputs: Dual (bi-amp) 5 way binding posts FeaturesFeatures: Crossover: 2.6kHz and 2.6kHz cascade tapered 2nd order Magnetic Shielding Manufacturer WarrantyParts: 5 years limited Labor: 5 years limited