I used the Xantech 634-00 ground breaker on my Time Warner Cable HD box.I only get TNT and Discovery channel in HD and they looked good with the Xantech.The cable company's need to get their act together on these ground issues with their equipment!
_________________________
Outlaw 990\7500|Klipsch RF-7 mains|Klipsch RC-7 center|Klipsch RF-3 rear|Velodyne ULD-II 15" Sub|Paradigm Seismic 12 Sub|Sony VPL-HS20 front projector|110"16:9 Stewart Firehawk |MX-700 remote

My Theater:
http://taz.smugmug.com/gallery/426426