Audio Explosions from the Samsung NP900X4D-A03US speakers on the Samsung NP900X4D-A03US of the Series 9 were loud and commanding when watching "The Avengers," but music was another story. However, dig deep into the Audio control panel, and you can tweak the profiles of the speakers much more. Samsung NP900X4D-A03US Laptop User Manual Samsung NP900X4D-A03US Enhancements tab lets you do neat things, such as adjust the pitch, even remove vocals from songs. SoundAlive let us adjust equalizer settings, either with presets[…]