connect all video directly to your tv
conect the L/R phono from xbox to tv aswell
use the optical out on you sky box/x-box to conect to the amp.
that way you can have the surround sound on whenever u want / or just have the sound commin through the tv, without swapping cables around
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LG60PY2R, Lg50PC1DA, , Kef 5005.2, Onkyo TX-SR674E, Sony HTSF 1000, X Box 360, Sky HD