Fi Car Audio SP4 12v2+ D1 - user opinions

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Summary: Type: Subwoofer; Size: 12"; RMS Power: 3500 W; Max Power: 7000 W; Sensitivity: 84 dB; Impedance: 2x 1?�; DC resistance: 1.3 ?�; Resonant frequency: 27 Hz; Total Q factor: 0.29; Suspension equivalent air volume: 27 L; Maximum linear excursion: 33 mm; Resonant frequency: 27.9 Hz; Electrical Q: 0.30; Mechanical Q: 7.96; Suspension equivalent air volume: 27.1 L; Force factor: 17.18 T?�m; Suspension mechanical resistance: 8.6 N?�s/m; Suspension mechanical compliance: 86 ?�m/N; Moving mass: 382.1 g; Moving mass (including airload): 390 g; Surface of the diaphragm: 480 cm??; Effective diaphragm diameter: 24.7 cm; Maximum linear excursion: ?� 33 mm; Displacement volume at Xmax: 1584 cm??; Efficienc ...

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