LF12" (300MM) Poly Propylene cone, Voice Coil 51MM Front Firing Tri Ported Bass Reflex design Max SPL: 108Db, 250W Dynamic 150W RMS, 4 Ohms Frequency Response: 30 Hz - 100 Hz ±10dB Frequency Range: 10HZ- 120HZ Sensitivity: 89dB @ 1W Enclosure: MDF, Enforced Bracing Mesh. Tri Ported Bass Reflex design MRP: 30000 DP: 15000