Coaxial Car Speaker CS-454 4" 2-Way Car Speaker Rubber Edge, Glass Fibre Cone 1.5" Tweeter 8oz Magnet 1" Voice Coil Max.Power: 150W Frequency Response: 80-21kHz Sensitivity: 91dB CS-554 5" 2-Way Car Speaker Rubber Edge, Glass Fibre Cone 1.5" Tweeter 10oz Magnet 1" Voice Coil Max.Power: 200W Frequency Response: 80-21kHz Sensitivity: 91dB CS-654 6.5" 2-Way Car Speaker Rubber Edge, Carbon Fibre Cone 0.75" NdFeB Silk Dome Tweeter 15oz Magnet 1" Voice Coil Max.Power: 250W Frequency Response: 60-23kHz Sensitivity: 91dB CS-6954 6"x9" 3-Way Car Speaker Rubber Edge, Glass Fibre Cone 2.5" Midrange 1.5" Tweeter 25oz Magnet 1" Voice Coil Max.Power: 300W Frequency Response: 60-25kHz Sensitivity: 91dB