There are some disadvantages to an HDMI splitter, one of which is that it only mirrors the input source across displays. Expanding your viewing setup is among the many clever uses for your HDMI ports, however, and an HDMI splitter enables a lot of practical viewing setups. Sports fans can host watch parties and spread out across multiple TVs in a single room. If a setup that allows you to mirror your favorite content across TVs is right for you, Amazon has a lot of feature-packed and affordable HDMI splitters to choose from. We've also taken a look at the best sellers on Amazon in order to narrow down which HDMI splitters are worth buying.