Just want to know if you all accept the sound quality of the DELL Vosto or if I have a defective device. I made a video. The sound has a bandwith of about 350Hz to 15khz. Because nothing in range of 120hz is going out of the speakers, it sounds terrible.
Please watch this:
Sounds pretty bad all right.
Try running the Dell Diagnostics audio tests. If the music in the tests sounds just as bad then there is a hardware limitation causing the narrow bandwidth. You might be able to improve it with eq. But if it sounds better during the test then either the driver or the configuration is making it sound worse when you boot back into Windows.