new slim volume level question....

I got the new sliver slim psp yesterday at bestbuy which is very cool. I have a question is it normal where I have the volume on the psp all the max high but it doesnt seem to loud. Like I can hear but by being full blast I thought its will be much louder is this normal? Becuase if i would to turn the volume level on the psp to half ways then you cant hear hardly anything. I tried both daxter and family guy same volume issue if its a issue. Thanks...