Speakers only work with headphone

If the crackling occurs only when opening windows or another program, the crackling is not due to the headphones but to a lack of CPU resources in your computer settings.
If you are in Windows 7,

1. click the Start button , and then click Control Panel. In the search box, type Performance Information and Tools, and then, in the list of results, click Performance Information and Tools.
2. Click Adjust visual effects. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
3. Click the Visual Effects tab, click Adjust for best performance, and then click OK.

most system has seperate audio ports for the speaker and the headphone but they are interchangeable. try plugging the speaker on the audio your using for the headphone. if your already using the same audio jack then try using another speaker, but since you mentioned that the headphone works then its possible you might need to replace your speaker

Try following solutions, if it works for you

To switch between speakers and headphones on Firefox,
make sure your headphones are plugged in first,
Right click on volume on the bottom right corner of your screen,
Then select Volume Mixer,
then double click on System sounds,
Click on the playback tab,
then you could switch between speakers or headphones, just select one and click "set default" and OK
only sounds in firefox will play in the headphones,
and windows media player will play on the speakers

You could leave your windows media player to play on the speakers while you listen to firefox videos in the headphones

If you want the media music player to play in your headphones also;
You have to change it in the media player program,
go to options on the media player, then look for playback devices, there should be 2 options speakers and headphones,
just pick one

I usually set the firefox audio to my headphones,
and a media player to the speakers

Please rate & vote if you like solution...

Thanks

The reason is most likely that your speakers are the default device for listening to sound. Go to the control panel > Sounds > Look at the devices listed, Highlight the headphones icon and select default, hit apply and ok.

Try here:http://www.computing.net/answers/windows- xp/headphones-amp-speakers-switching/55486.html Also:http://www.vistaheads.com/forums/microsoft-public-windows-vista-music-pictures-video/133605-sound-doesnt-switch-automatically-headphones-when-plugged.html Also:http://www.vistax64.com/sound-audio/198039-sound-doesnt-switch-speakers-headphones.html scroll down the page for the discussion.

Make sure in the volume mixer that it is using the right sound device. You most likely have it set to the wrong device output. When you plugged in the headphones in kinda automatically switches, but to use the speakers again you have to do it manually. Just hook up a cheap av receiver to your computer and use this headphone input instead. a 100$ 5.1 av receiver beats any pc speaker system.

Try a different set of head phones.

sounds (pun intended) like you have your headphones plugged into the microphone input. See if you can change the spot they are plugged in...

good luck

go over all speaker connections and ensure they are good and also plugged in to the head unit and that the wires didn't fall out during install.

Yea it sounds like the headphone have a sync problem. what you can do i go the Apple store and they should help you out they will swap your headphones and then it should work.
Thank you, Apple Care Technical Support