Phase Technology CI6.1X Ceiling SpeakerPhaseTech CI6. 1X Ceiling Speaker 6. 5 inch 2 Way In Ceiling Speaker with Micro Flange Grille. Designed and engineered for versatility, the CI6. 1X delivers high end sonic performance for either home theater or stereo music applications. The versatile variable axis tweeter allows the high frequencies to be directed to the listener in those situations where placement is less than optimal. All CI X models feature micro flange magnetic grilles, which are