Got it today. While calibrating with an Avia DVD...when it runs through its frequency sweep down to 20hz...if I have the volume up 1/2 way on my receiver and 1/2 way up on the sub, it WILL blow the fuse. Without fail. I have it tuned down to 16hz. Crossover frequency is disabled. My receiver is a Yamaha RX-V795A. No problems as such thus far with movies, music. Is this normal? I tried contacting SVS...but they're sales staff is off to the CES per their recording. Looking for opinions. Otherwise, this thing is unbelieveable.