Any program that requires sound, my computers speakers will pop and crackle anytime there is a break in the sound. I tried headphones and it comes through them as well. I reinstalled the restore driver that came with it and is was not fixed. It isn't due to volume because it happens even when soft.
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Re: Crackling Speakers and Headphones
It may be that your graphics and audio driver are conflicting with each other.
Go to Start> Run, then type 'dxdiag' then hit Enter; this will run a sound and video diagnostics tool and check for problems.
The only other thing if all the drivers are ok is a possible motherboard fault on the onboard sound chip.
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The crackling could be due to a faulty wire or jack connection. If you have any other sound device (e.g. headphones), try connecting that one instead of the Z4 and see whether the crackling disappears (in which case it's the Z4) or not (in which case it's the jack or the computer). Could arguably be an EM or electrical interference, but you'd need a laptop running on batteries to check the second, and trying orienting differently the speakers to try checking the first.
The music slowing down means something's wrong in the computer: the Z4 are purely passive, they can't do anything to the music tempo. Try running an antivirus check or try Task Manager (or Process Explorer) and see whether anything's eating more CPU than it should.
Does the crackling and popping sound comes only from the sub, or from the other speakers too? Try switching of to check. I think that it is problem on volume control potentiometer. In that case all the speakers must sound crackling and popping. If the problem is only in the sub you have to check its connections.
If ayou have a system with speakers that works and a different set is crackling
the set that crackles is to be determined the bad set. Cones dry up a bad assembley just coinsidents having a bad set of speakers. It is an AUDIO problem not a computer problem
Your speakers are frying, hence the crackling sound, as this is a frequent problem owing to the location of the speaker assemblies and the sound output in an area of the system where the ambient heat exhaust vents are located.
I am a bit confused, though, as to why you get no better sound through headphones or external speakers, since this is not usually the case in this frequently cited problem.
One possibility is that not only are the speakers, but the entire sound output assembly.
Warrantee work if available, if not try a shop where they also sell used Dell computers as they will have pulls that could cut your losses.