Quote:
Rather than the power for the pre-amp inserted through the pre-amp's supplied splitter
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The preamp's supplied "splitter" is not a splitter, it is a power inserter; they are not the same. You must not replace the preamp's supplied power inserter with a splitter. There is no signal loss with the power inserter, as there is with a splitter.
If you are feeding more than one TV, the splitter should come after the power inserter.
If you must insert a splitter between the preamp and the power inserter, that is when to use a power passing splitter, but you still must use the power inserter.
The power inserter allows the coax between the preamp and the power inserter to carry the DC power up to the preamp AND send the signals down to the TVs.