Proficient Audio Systems C800TT 8-Inch Dual-Voice Coil Graphite Ceiling Speaker With Twin Tweeters (Discontinued by Manufacturer) 150W 8-Inch Dual Voice Coil Graphite Woofer Two 1-Inch Aluminium Dome Tweeters Imp: 8 Ohm Freq Resp: 28 Hz22 Khz