We had custom cut high density real wool felt (accept no substitute) tweeter surrounds or fascias made for the Reference 1.5's that absorb and quiet this interaction. What you will get when this is removed is a clearer view into your stage and recordings. What the microphone captured is revealed in your room without the distortion to time (body) and phase (space) caused by early reflection. Space opens up, deepens. Vocals and instruments appear more truthfully in that space, rounder and more physically right. The tweeter surrounds attach with Velcro tabs (included) and also eliminate the issues caused by grills - yes you can now run your grills installed!