It wasn't a reflection. The loud popping sound is what drew my attention to the speaker in the first place. It was only then that I saw the sparks and heard more popping. With the lights off, my HT/living room is completely dark, but I think the sparks were visible through the space between the woofer and the phase plug (the grill was off).Originally Posted by curtis
The good news is that I've been unable to replicate the sparking. I had just taken the speaker out of its shipping carton a few hours before I saw the sparks. Perhaps something got into the driver during shipping and has now worked its way out.