Gun Sounds

Wassup peeps!!

I recently got me a new PC and now my MW2 gun sounds are different in a bad way like a downgrade. I should know because one of my friends plays on a very bad computer and his gun sounds are awful and mine were ten times better. Any know how i can change em?
I play with a gaming headset

Thnx

See if you have any filters on in the sound option like classic, rock, etc... and set it to normal. Otherwise look for the driver for your gaming headset or go google your problem.