Here's the other thing.

by R. Proffitt Moderator - 6/13/13 11:05 AM

In Reply to: correct Samsung TV model# is UN55C6300SF by marthaready

25 foot should work but as a test we would try the normal 6 foot cable first. I'm sure some consumer will blurt out their gear is that far away but the cost of a service call will include such a test. They may tell you it's not supported or supportable at that distance so give Pepe7's idea a try too.
Bb