CS-6918 1) 6 x 9 4-way speaker 2) PP cone with rubber surround 3) 1-1/2 mid-range 4) 1 tweeter 5) Piezo tweeter 6) 20oz. magnet / 200 watts (max.) 7) 1 aluminum voice coil 8) Frequency response: 60Hz-25kHz 9) SPL: 91dB CS-618 1) 6-1/2 3-way speaker 2) PP cone with rubber surround 3) 1 mid-range 4) Piezo tweeter 5) 15oz. magnet / 160 watts (max.) 6) 1 aluminum voice coil 7) Frequency response: 60Hz-23kHz 8) SPL: 90dB CS-518 1) 5-1/2 2-way speaker 2) PP cone with rubber surround 3) 1 tweeter 4) 8oz. magnet / 120 watts (max.) 5) 1 aluminum voice coil 6) Frequency response: 80Hz-22kHz 7) SPL: 90dB CS-418 1) 4 2-way speaker 2) PP cone with rubber surround 3) 1 tweeter 4) 5.4oz. magnet / 100 watts (max.) 5) 1 aluminum voice coil 6) Frequency response: 100Hz-22kHz 7) SPL: 90dB Outer packing: Export carton