Volume Issues Anyone??

I have a MacBook Pro 17 inch, 2.5GHz and 2GB of RAM. The new MacBook Pro's basically.

Anywho, I have windows Ultimate installed on here as well, and I have noticed that the speakers are nowhere as loud or powerful while using Leopard.

On Vista, the volume is literally on 40 and it's very loud, to the point where I never pass 50 because well, I never have to, it's that loud.

On the Mac side of things however, I literally have to have the volume at like 90, and its nowhere as loud as the Windows side.

Any ideas?

Thanks