I recently purchased though Dell Computers Z323 speakers. The problem is the left hand speaker crackles and distorts at certant freqencies. I have made sure the yellow plug is firmly connected to the subwoofer. My thoughts are that there could be an internal problem with the speaker. Hi! The speaker is surely damaged. You will need to have it reconed to resolve the distorted sound. Hope this helps and thank you for using FixYa!

There is no optical input for this speaker. Logitech Support

Sounds like you have blown out the cone on the speaker. Have you removed the covering to see if the speaker in that earphone is intact?

This has just happened with my Logitech Z323 left speaker. I wanted to know if you were able to fix the issue?

hi you can detached or disconnected the subwoofer cable, for temporary or permanent fix, as the speaker sound also produced good quality sound..

here how i disconected the subwoofer cable, it easy to find at the bootoom, see also utube video inside the link given below

http://atozcs.net/dell-xps-l501x-subwoofer-produce-distorted-crackle-sound/

bad signals

in mu experience its a problem with voltage of your speaker.

did you tried before touching the speakers hard...

because the magnetic in the central of the speaker may damaged.

Likely, what you are experiencing is the fact that the batteries in your speaker are running low. The sound of this speaker – as with any battery operated device – is reliant on fully-charged batteries. When the charge gets too low, you will experience sound distortion or abnormalities. Just put in fresh batteries, and you should be all set.

crackling and distortion suggests poor electrical connections. Make sure that the connectors are a tight fit

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.

If the optical cable was bad, the sound would be distorted period. The optical cable (whether coax or fiber) just simply carries the coded audio to the receiver which in turn decodes it. I have never heard of a signal just screwing up the center channel, and I've been at this better than 30 years. Not to say it's impossible, but very unlikely.

Did you try swapping speakers? Move the left one to the center and the center to the left. Does the center remain "distorted"? Does the left become "distorted"? If the center remains distorted, the receiver's center channel has something wrong with it. If the left is distorted, the speaker has a problem.

For the future. it is un-neceaasy to purchase expensive cables. In fact it could make things worse. The claim to fame of most expensive cable manufacturers is the gold plating on the connectors. Unless the bioth sides have gold plating (receiver, cable box) this actually creates a capacitive reactance between the different metal types. FYI-capacitive and inductive capacitances are the basis for designeing cross-overs, filters, etc. So basically, an undesired filtering effect is created. This applies to speaker cables, audio, video, etc....

Jeff