Really depends on how your house is set up and what is between it as well as what other WIFI's are around using same channel's. Mostly if you stick to channels 1, 6, 11, or 14 you will have the best luck or many routers will auto decide for you. Also if you run the 2.4 (longer throw but slower) vs 5g band (shorter but faster). If you can run a network cable from modem to TV room you can plug this router into that cable and have all your tv stuff plugged into a hardline connection from this router. that may also make it closer to the kid's room. or you can also get wifi repeaters that would also improve your signal.