First - I will say I love my playbar. Though the absence of DTS support is annoying, its something I've put up with for ease of use, good quality, and the great iOS App.
However, I have been pretty disappointed with this crackling/popping issue I have. I've had it for some time, really since just after I bought it. It happens on all sources, Apple TV, Netflix from TV, youtube, etc...It's almost like crackling when it gets to a certain volume. I have tried different optical audio cables, and have even had a new TV since I've gotten the playbar...still has the crackling/popping. Please help me fix this, or switch it out. For a $700 soundbar I'd hope this wouldn't be an issue.