Try raising the screen about 6", so the frame falls between the two drivers. In addition, having the frame farther away from the speaker itself may cause more issues than if it is close. All you can do is experiment and see what works and what doesn't.
FYI, one guy who had this same problem finally changed out his speakers, such that the layout of the tweeter/woofers avoided the problematic area. Worked great for him.
It's a VIRTUAL channel unless stated otherwise.
Last edited by RayGuy; 07-02-2019 at 11:40 AM.