Sub blowing Christmas lights?

Being he didn't complain about other things blowing around the house sounds to me that a poor neutral connection in the service opening intermittently somewhere causing a voltage problem could be ruled out.One rare exception would be if that outlet is split,and running off of two separate phase legs.

Thanks for all the informative info. The sub is off and not playing. However, I found a short in the Christmas lights. BOTH sets. I took the second set, put new fuses in them and plugged them in another outlet, and they came on. When I sat them down, they came back on. I did the same thing with the second set. I plug a third set into the outlet and they worked just fine.

Hello,
It is not the sub doing it most likely as it is simply the amount of load (in Amperes of current) on that particular circuit. Plug less stuff, whatever it may be, into that circuit and use others that are less loaded down already if possible.
Hope this helps,
Tom

So forget Christmas and enjoy your sub. Man, you gotta get your priorities straight.