Since the first release of the kernel 4.x.x, when i boot my computer, i can here a crack sound.
I've tried on different Linux, Ubuntu, OpenSUSE, Arch and i always can here the crack at boot.
My speakers are not dead , on kernel version before 4.x.x, they don't bug.
If you need more information, i'm here.
I have no crystal ball to show what is your hardware at all :)
Please give alsa-info.sh output. Run the script with --no-upload option and attach to Bugzilla (don't paste).
*** This bug has been marked as a duplicate of bug 104341 ***