Which device is connected to the TX9000 AV expansion box for video input? seenagape 9 years ago Which device is connected to the TX9000 AV expansion box for video input? A. presentation (TS4) codec B. collaboration/presentation display C. center (TS1) codec D. built-in video splitter E. left (TS2) and right (TS3) codec ← Previous question Next question →