4) New Kicker 40CS684 6x8" 450W 2 Way Car Coaxial Speakers Stereo Audio CS684 Peak: 450 watts per pair / 225 watts each RMS: 150 watts per pair / 75 watts each EVC (Extended Voice Coil) technology for high thermal handling Durable, Ribbed UV-Treated Polyester Foam speaker surround for precise linear excursion Frequency response: 45-20,000 Hz