Summary: Diameter: 6.5 Inch; Sensitivity: 83 dB; Impedance: 4 Ohm; Peak Power Handling: 600 Watts; Number of Voice Coils: Dual; Mounting Depth: 4.17 Inches; RMS Power Handling: 300 Watts; Terminal Type: Push & insert style terminals for easy installation.; CONFIGURATION: Round; SURROUND / CONE COUPLING: The pressure treated double stitched foam surround along with the dual poly cotton spider helps keep the piston motion of the subwoofer linear and distortion free.; VOICE COIL / FORMER ASSEMBLY: Vented aluminum former holds a 1.5" voice coil while allowing the heat to be exchanged. (Less heat means less distortion); SPIDER: Specialized MB Quart dual poly cotton spider with double centering allows ...