Phase Technology CI20X Ceiling SpeakerPhaseTech CI20X Ceiling Speaker 6. 5 inch 2 Way In Wall Speaker With Micro Flange Grille. The CI20X offers a premium full range speaker at a lower cost than comparable speakers. This versatile, high performance in wall speaker can be used in left, right, center, and surround applications. A pivoting tweeter can be used to direct high frequencies to your listening area. The grille can be painted to match any room color. The CI20X pairs with the entire