Component Car Speaker CMP-631 6.5" 2-Way Component Speaker Woofer: 6.5" with 12oz Magnet Rubber Edge, Injection Cone Voice Coil: 1" Crossover: 2-Way Tweeter: 0.75" Impedance: 4ohm Max Power: 200W Frequency Response: 30-1.5kHz Sensitivity: 90dB CMP-630 6.5" 2-Way Component Speaker Woofer: 6.5" with 15oz Magnet Rubber Edge, Injection Cone Voice Coil: 1" Crossover: 2-Way Tweeter: 0.75" Impedance: 4ohm Max Power: 200W Frequency Response: 60-23kHz Sensitivity: 90dB CMP-621 6.5" 2-Way Component Speaker Woofer: 6.5"   Magnet: 15oz Voice Coil: 1" Rubber Edge, Injection Cone Crossover: 2 Way Dome Tweeter: 0.75" Max.Power: 200W Sensitivity: 90dB CMP-620 6.5" 2-Way Component Speaker Woofer: 6.5"   Magnet: 10oz Voice Coil: 1" Rubber Edge, Injection Cone Crossover: 2 Way Dome Tweeter: 0.75" Max.Power: 180W Sensitivity: 90dB