As soon as I got my new 5.1 speakers I noticed the center is a little more quiet compared to the fronts and rears. Trying to fix the problem, I turned the fronts down to -5 to even the volume out like the rears and turned up the center to +3. After doing this the center still seems a little quiet. This confuses me because the center has two cones so you'd think I'd be slightly louder. So my question is, can I turn up the center channel even more to match the rest of the speakers without harming it?