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; Being distracted most of the time wasn't too bad, but it was especially noticeable with marksmen, where the sounds of gunfire and circular impacts were more clearly visible on screen before they could be heard. In short, this cable eliminated those problems. questions complete.