New tech syncs small speakers for big sound

Music is good. It's even better when it's loud, high-quality and playing all over the house. (Just one guy's opinion.)
To achieve this, you can buy multiple, expensive speakers from a company like Sonos and distribute them around the house. That can cost thousands of dollars.
Another idea is to synchronize the speakers you already own, and have them all play the exact same music at the exact same time for a quality- and volume-multiplying effect.
Sounds simple, right? Trouble is, it's hard to s