Does a active splitter require power?
They do not require any kind of power to run. Active Splitters run on power. Most active splitters also boost the signal a tiny bit to compensate for the signal that would usually be lost after passing through a passive splitter. Do not confuse an Active Splitter with an Amplifier.
Can you use a HDMI switch as a splitter?
Why an HDMI Splitter Doesn't Work Like an HDMI Switch An HDMI splitter doesn't work as an HDMI switch due to the differences in their circuitry. Even though both devices will allow you to send the source signal to more devices than there are HDMI ports for, you can't use them interchangeably.