Hello

I need to host 4 Radios and 3 Televisions (LIVE)

where can i find fast servers with a full support of those applications.

Thanks

You need to host sites or streaming media?

You better offer more information such as bitrates, concurrent connections, bandwidth requirements, budget, location preferences and anything you think could help people offer a good suggestion.

I think that you need to start with dedicated servers with powerful CPU options. And are you on your start or you are upgrading?
I just would like to understand what are your current needs, because anyway dedicated to dedicated server is very big difference

Do you need to store the media files on the servers or you need them just for for streaming? You'd definitely need Quad-Core or Dual Core processor based servers. You also need to specify a level of server management.

You may want to consider rackspace.com, if you are looking for a fully managed server.