Pioneer S-IW651-LR CST Series 6.5-Inch Rectangular In-Wall Speakers (Pair) (Discontinued by Manufacturer) Coherent Source Transducer (CST) Technology Pioneer CST 6.5-Inch In-Wall Speaker 1-1/2 Inch Aluminum Tweeter 6.5-Inch Mica-filled IMPP Woofer 120 Watt Power Handling