Thank you for viewing. This item is a Jensen alnico magnet speaker. I previously acquired this item as a used item in good condition, intending to install it. However, I never got around to installing it, and I am now selling it because I sold the amplifier (Tweed Tone 5E3 Deluxe type) it was intended for. Specifications: Diameter: 307 mm / 12″ Impedance: 8Ω Power Handling (RMS): 25 W Power Handling (Peak): 50 W Sensitivity: 93.7 dB Voice Coil Diameter: 25 mm (1″) Voice Coil Depth: 8 mm Magnetic Gap: 6 mm Magnetic Flux Density: 0.96 T Magnet Weight: 200 g Weight: 1.5 kg Please understand that this is a used item before purchasing.