I don't believe the
cable coax line goes through an amplifier, but the
regular TV antenna coax does....the reason I think this is because we only get "snow" from a digital or analog TV signal unless the "booster"(which I presume is just an amplifier) is on...that's the little button that lights green when it's on...next to the
12v outlet near the inside port for the antenna coax...at least that's the way it is in our 19'. When using cable we don't use that booster ...