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Xfinity cable box not processing Dolby Digital Surround...
Xfinity X1 Atmos - AVS Forum
Xfinity XG1v4 and Logitech Harmony Hub Pairing - AVS Forum
Official* Xfinity X1 STB Thread - AVS Forum
Official* Xfinity X1 STB Thread | Page 66 - AVS Forum
Denon AVR-X3700H Randomly Losing Input Signal from Cable Box
Help Locating IR Sensor in Comcast X1 (Pace PX001ANM)...
3 way Splitter question with Xfinity X1 service. - AVS Forum
Official* Xfinity X1 STB Thread | Page 21 - AVS Forum
HDMI through receiver or to TV and ARC to receiver. - AVS Forum