8 ohms. 600 watts. Original speaker replaced two years ago with an Eminence Kappalite, so this cabinet is lighter than the original factory weight by about 10-15 lbs. Still has that rich, full tone you expect from a Mesa Powerhouse cabinet with a little bit less of the weight. Some scuffs on the front corner and minor cosmetic blemishes from gigging, but overall, the Tolex is in very good shape.