I've had a pair of Supernova 8-F for a little over a year. The overall sound quality of the speakers are excellent. However, just recently the bottom driver on one of the towers has started making a scratching type noise as if there may be a short in the wiring. I called Pure Acoustic's support (which you will ALWAYS get a recording asking you to leave a message) and left a message about my issue. They finally called me back about 4 days later advising that the..