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Your home entertainment system may provide the flash that wows your friends who have come over to watch the big game or a favorite flick, but it’s the unseen heroes, the hard-working cables and devices toiling in the background, that make it all possible. These home theater accessories get their due with Groupon’s deals, which include HDMI cables and TV antennas that can enhance your home cinema.

Connect with HDMI Cables

When you’re designing a home entertainment system, you’ll need to account for the cables that connect everything. If your TV and the peripherals are modern, you’ll need a bunch of HDMI cables to hook up Blu-ray players and video-game consoles. If you’re short on ports, an HDMI switch lets you plug multiple devices into one HDMI input, using the switch to determine which device shows up on screen. And if you’d like to show a big game on multiple screens, use an HDMI splitter, which lets you connect multiple TVs to a device and choose which ones get the picture.

What Do You Want to Watch?

As anyone who’s managed to cut the cord knows, you don’t need cable to enjoy live TV and on-demand video. For the latter, a smart TV or streaming media player can bring in all sorts of programming. But for live local news and sports with no monthly fees, there’s no substitute for a TV antenna. If you have an older (non-HD analog) TV, pick up a digital converter box to translate the signals into something that the TV can handle.