12 inch speaker very high quality with Ceramic magnet

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Nominal Overall Diameter: 306 mm/ 12 inch
Musical Power (DIN 45500): 50 Watt
Resonance Frequency: 74 Hz
Nominal Voice Coil Diameter: 25 mm/1 inch
Magnet Weigth: 280 Gr/ 10 oz.
Sensitivity @ 1 W, 1m: 93.8 dB