Are speaker wall plates necessary?? Can't you just run directly to AVR??
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Monolith by Monoprice THX-365IW THX Certified Ultra 3-Way In-Wall
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HDMI audio video wall plate supports pass-thru for High Speed HDMI features such as HDMI Audio Return Channel (ARC), HDMI Ethernet Channel (HEC), 48
Cable Matters 2-Pack 2-Port HDMI Wall Plate in White (4K UHD, ARC, and Ethernet pass-thru support)