In December 2013, I purchased two Atomic CLR active wedges. This is by far the best pair of speakers I've ever bought but lately, one of them has stopped working. When I turn it on, The CLR emits a low-volume yet constant audible white noise-ish hissing. The volume of the hissing stays low but consistent, no matter what the input or output volume settings are. Also, no input signal is audible, just the hissing. Any ideas about what the problem might be and/or how the issue could be more thoroughly diagnosed?