Recently some friends of mine got a starter system for home use. It consists of 2 parts, a wireless mic system and a PA speaker bundle.

https://www.amazon.com/dp/B00R4FBN0K/ref=cm_sw_r_cp_tai_8ZGuybNSFQSD5

http://www.guitarcenter.com/Gemini/AS-12BLU-LT-PK-12-in-Powered-Bluetooth-Speaker-Package.gc

They use their laptop with Karafun or YouTube. The laptop sound is routed to the mic system via Bluetooth, which is connected to the speaker. They send the video to the TV with HDMI or just use the laptop screen.