Yes, you can use an HDMI splitter and an HDMI switch together to achieve specific configurations in your home cinema setup. For example, you could connect multiple HDMI sources (such as gaming consoles, Blu-ray players, and streaming devices) to an HDMI switch to consolidate them into a single input on your TV or display. Then, you could use an HDMI splitter to duplicate that signal to multiple displays, allowing you to enjoy the same content on different screens simultaneously.