I have a Bose Soundtouch 300 (with subwoofer). It's a fantastic sound system, but I've had audio/lip sync issues with most content since day one. With 4K streaming content, the video was almost always half a second ahead of the audio, which was particularly noticeable with dialogue. Also, the sound effects in my games were always a bit delayed; It wasn't too bad to be distracted most of the time, but it was particularly noticeable with marksmen, where the sounds of gunshots and circular impacts were more obvious on screen before they could be heard. In short, this cable eliminated those problems. questions complete.