Recommended for professional audio and bass guitar applications as a mid-range, Impedance: 4 ohms, Power Rating: 200W, Maximum Power: 400W, Frequency Response: 40-2kHz, Voice Coil Diameter: 2"" 50, 8mm, Depth: 4, 25"" 107, 95mm, Coil Contruction: Copper voice coil, Magnet Composition: Ferrite magnet, Cone composition: Paper cone, Nominal Basket Diameter:10"" 254mm, Sensitivity: 90, 5, Magnet Weight: 38oz, Core Details:, Coil Former: Polyimide former SKU: TBAL5618