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Using the kids room coax outlet to back feed other jacks is fine. By using a four way splitter for two TV's you're losing signal. Because you're using a smaller antenna, every dB is precious. Try a two way splitter instead. Be sure the coax from the kids room is connected to the input. Be sure nothing else is connected to minimize loss.
Four way splitter loss 7 dB
Two way splitter loss 3.5 dB
You won't know until you try but it could make a difference.
Post edited and corrected. I got it in my head you were using an eight way splitter.
You can try a pre amp if you want but really and truly the job of the pre amp is to maintain the integrity of the original signal despite losses from distribution of the signal thru long coax runs and splitters. If you do buy one make sure the noise figure is 2 dB or less. Quality preamps will provide this spec, a lot of cheap ones will not.
Last edited by phone man; 10-Jan-2013 at 2:04 AM.
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