Even with coax, as long as the splitter is up to standards, it shouldn't degrade the signal either. I have my main cable line feeding into a 6 line splitter and each of those 6 is split at least once more, no problems at all.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70