ContributionsMost RecentMost LikesSolutionsRe: Whats the furthest a TV box can be extended meter wise? I dont how ethernet cables would help? Its the tivo boxes i have that require the r6 coaxial cable. Re: Whats the furthest a TV box can be extended meter wise? Im talking about extending my connection from house to shed. Whats the furthest a TV box can be extended meter wise? As the title above says, looking to build a man cave and just wondering what the longest extension can be. Thanks in advance.