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Metal basin, good quality dynamic sound. Long stroke, clear voice, stronger base for speaker subwoofer. Four hole plate cooling, high power and more durable. Rubber edge anti-aging and high temperature, without deformation. Layered diaphragm, nicer sound performance. Application of sound box update, DIY and what shape you want. ? Specification:
Nominal impedance: 8 ?? Nominal power: 10W Sensitivity (2.83 V / 1 m): 88 dB Frequency: 40-20 kHz Diameter of voice coil 120mm Width of voice coil: 108mm Magnetic circuit, type: shielded magnetic circuit Magnet material: high performance ferrite Force coefficient (BL value): 6.5n / A Height of the magnetic gap: 6.0mm CIS: 857um / n Mechanical Q value: 4.21 Electric Q value: 0.43 The total value of Q was 0.39 Size: 4.5'' ? Package included: