Aluminium Basket Woofer WF-10A21 Die Cast Aluminium Basket  10" Woofer with 50oz Magnet  Rubber Edge, Flat Injection Cone 2" Voice Coil Impedance: 4ohm  Max Power: 500W Frequency Response: 30-1.5kHz Sensitivity: 90dB WF-12A20 Die Cast Aluminium Basket  12" Woofer with 95oz Magnet  Foam Edge, Non-Press Cone 3" Voice Coil Impedance: 4ohm  Max Power: 800W Frequency Response: 20-1kHz Sensitivity: 90dB WF-1086 Die Cast Aluminium Basket 10" Woofer with 40oz Magnet Foam Edge, Non-Press Cone 2" Voice Coil Impedance: 4ohm Max Power: 500W Frquency Response: 30-1.5kHz Sensitivity: 91dB WF-1095 Die Cast Aluminium Basket 10" Woofer with 2x40oz Magnet Rubber Edge, Injection Cone 2" Voice Coil Impedance: 4ohm Max Power: 600W Frquency Response: 30-1.5kHz Sensitivity: 90dB WF-10A07 Die Cast Aluminium Basket 10" Woofer with 40oz Magnet Rubber Edge, Aluminium Cone 2" 4-Layer Voice Coil Impedance: 4ohm Max Power: 500W Frquency Response: 30-1.5kHz Sensitivity: 91dB WF-1075 Die Cast Aluminium Basket 10" Woofer with 40oz Magnet Foam Edge, Non-Press Cone 2" Voice Coil Impedance: 4ohm Max Power: 600W Frquency Response: 30-1.5kHz Sensitivity: 90dB WF-12A28 12" Woofer with 40oz Magnet Rubber Edge, PP Cone 2" Voice Coil Impedance: 4ohm Max Power: 600W Frequency Response: 20-1kHz Sensitivity: 90dB WF-15A27 15" Woofer with 65oz Magnet  Foam Edge, Non-Press Cone 3" Voice Coil Impedance: 4ohm  Max Power: 900W Frequency Response: 20-1kHz Sensitivity: 90dB WF-10A26 10" Woofer with 40oz Magnet  Rubber Edge, PP Cone 2" Voice Coil Impedance: 4ohm  Max Power: 400W Frequency Response: 30-1.5kHz Sensitivity: 90dB WF-10A25 10" Woofer with 50oz Magnet  Foam Edge, Non-Press Cone 2.5" Voice Coil Impedance: 4ohm  Max Power: 600W  Frequency Response: 30-1.5kHz Sensitivity: 90dB