I purchased this laptop on thanksgiving deal last month. When I play music/video/audio with more than 50% of the volume level of the speakers, the speakers/sub-woopher are giving crackling sound. it's terrible.
I checked the Realtek for driver updates and it's already updated. I troubleshooted the audio for issues but it doesn't display any problems with speakers/audio.
Save yourself some time and frustration. Check and see if the speakers still crackle when not plugged in via ac power. If they sound fine when the ac adapter is not plugged in, the problem could be the adapter. Out the box, my brand new dell sounded like garbage. I did everything, drivers, reset, etc...Finally, I just decided it wasn't a deal breaker, I would just use a bluetooth speaker. But I finally realized the only time the speaker sounded like garbage is when the ac adapter was plugged in. So I tried another one and they still sounded bad. I thought maybe I should increase the wattage so I got a 65W adapter and viola! I reset the system, plugged in the new adapter, changed the bios setting for power and it's been working like a charm. I hope that helps.