Proficient Audio Systems C640 6.5-Inch Graphite Ceiling Speakers (Pair) (Discontinued by Manufacturer) 5W - 125W 6.5-Inch Injection-Molded Graphite Woofer With Rubber Surround 1-Inch Aluminum Dome Pivoting Tweeter Imp: 8 Ohm Freq Resp: 32 Hz - 22 Khz