diameter: 30 cm / 12" power handling: 6500 WRMS impedance: 2 x 1 Ohm voice coil: 75 mm / 3" flat wire excursion: X max. 35 mm / 1.39" resonance frequency: FS 39,9 Hz SPL: 92,2 dB additional: VOXR surround quad centering paper- kevlar cone