So, I was listening to "Put on (remix)" and it sounded great, duh! However, I wanted to look at my sub, being that I don't/can't do that while I drive. I noticed that sometimes my sub would move but wouldn't really produce any noise and wasn't hitting. I have a sealed box (http://www.sonicelectronix.com/item_...1.5-Black.html) w/ two 10" Dayton HFs. I sealed my prefab box very well and connected my wire directly to the sub by drilling a whole in the back, which is sealed solidly. My amp nakamichi PA-2004. So, is this normal? Are my subs having trouble reloading or something.