I handed down my old projector (Mits HC1500) and screen, and a Chromecast dongle, to my girlfriend's sister. It set up perfectly at her apartment until we realized that it has no speaker and she therefore has no sound.\n\nSeems like the easiest and cheapest solution is to add a soundbar with HDMI in\/out - cheaper even than some hand-me-down speakers which would require her to buy a receiver.\n\nThe best options I could find were the Yamaha YAS-107 and the Vizio SB3830, both 200 bucks. Is there anything out there cheaper? Hoping to find a solution for $100 if possible. Willing to buy used. Also willing to consider alternatives to the soundbar, but trying to keep it simple and user-friendly for her.\n\nedit: the clarify what might be obvious, I'm thinking chromecast plugged into soundbar HDMI in, with the soundbar HDMI out sending video to the projector. If she wanted to she could also plug her laptop into the soundbar by pulling the chromecast.