Originally Posted by grassfeeder
cause I wasn't sure if it may clean up and spikes in signal and regulate things? I haven't a clue, but isn't that the point of the power conditioner in terms of the power in?
Just to make it clear, I'm only talking about the "coax" port on your power conditioner. For FiOS you don't need to worry about coax. But you do need to worry about spikes and surges on your electrical wiring.
FiOS delivers the signal to you house using optical fiber. This optical signal is completely immune to the usual suspects that cause spikes and surges, such as lightning strikes, large nearby industrial motors, cars that crash into power poles and cause high voltage AC lines to drop onto overhead coax or phone lines, etc.
An ONT on the side of your house connects the optical signal from the fiber to your "cable coax". This coax only exists from the ONT to your TV sets. So it's only a few hundred feet of coax at most, usually much less. If you have a lightning strike close enough to induce a spike or surge in this coax in your house, you will also have a voltage spike on your power lines that is large enough to blow out all the electronic equipment in your house (with or without a Monster power conditioner ready to sacrifice itself on your behalf).