CELESTION A-Type 8-Ohm 12-Inch 50-Watt American Tone Guitar Speaker, Black General Specifications, Nominal diameter: 12", 305mm, Power rating: 50W, Nominal impedance: 8, Sensitivity: 98dB Chassis type: Pressed steel, Voice coil diameter: 1.75", 44.5mm, Voice coil material: Round copper, Magnet type: Ceramic, Magnet weight: 35oz, 0.99kg Frequency range: 75-5000Hz, Resonance frequency, Fs: 75Hz, DC resistance, Re: 6.2 Mounting Information, Cut-out diameter: 11.1", 283mm, Diameter: 12.2", 309mm, Magnet structure diameter: 5.7", 145mm, Mounting slot dimensions: 0.31", 7.9mm, Mounting slot PCD: 11.7", 297mmNumber of mounting slots: 8 Overall depth: 5.1", 130mm, Unit weight: 7.7lb, 3.5kg