Since Ive gotten this game Ive noticed that the gun shots and explosions give a crunch, bass effect (Sounds as if the speakers are blown when bass is applied). Ive used on my speaker setup which is not blown and a new set of G930 Headphones. Adjusting volume levels in game and under windows does nothing. Is this due to using my onboard sound? I have a MSI P67A-GD65 mobo, here is a link to the board for specs.

http://www.msi.com/product/mb/P67A-GD65.html

Is this normal? It hasn't been a huge annoyance as I only notice it in certain areas but was curious if you guys get it as well.

Every other game I play sounds great. Bass effects are deep and sound correct. Its just this game.....