So I'm pretty sure I blew my sub. I was testing out some new/old gear and hit a low keyboard note. The keyboard volume was on max (doh!), the preamp gain was at half, the preamp bass knob was at max, and the power-amp knob was at 2, very low. It made a little (not loud) click/pop noise and stopped making sound. The power-amp appears fine. Why am I posting? Aside from making no sound and doing nothing w/ a 9v test, the speaker appears fine. The cone is not frozen in place and there is no rub when I press on it. I'm not positive but I think the cone looks like it's pushed a little further out than usual. So did I really blow it? If not is there any fix?