ITunes only outputting left channel through Soundsticks

I've been using the original Harman Kardon Soundsticks (USB type) for about six years now without problems, but just today they've started behaving oddly in iTunes and Front Row. Only the left channel is now output, through BOTH speakers. They work normally when I use the Quicktime player, but not iTunes/FR. If I switch the output to internal speakers, then iTunes outputs both channels normally. I tried deleting the preferences, and updating iTunes to 8.01 from 8.0 but without any difference. Have also tried rebooting, disconnecting and reconnecting the speakers, and the power to the speakers but nothing seems to make any difference. Additionally, there's no "balance" option in System Preferences for USB speakers.
There clearly isn't anything physically wrong with the speakers themselves so can only assume there must be a corrupted preference file or similar, but have no idea where to start looking. Can anybody help?

I have the exact same problem but I use Windows vista into a MOTU Ultralite Firewire interface outputting to some powered monitor speakers. I know the issue has got to be with iTunes because i can open the mp3 in windows media palyer and it plays just fine in proper stereo. It's really annoying and I cant seem to find the solution.

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Last edited by Ghosy (2013-10-06 16:34:01)

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pcm.dmix { type dmix;
ipc_key 1024;
slave { pcm { type hw;
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rate 44100;
period_time 0;
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buffer_size 8192;
channels 2; }
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Edit: The formatting may not display closing brackets }, but they are there. Copy the whole code.
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Message was edited by: DEC42

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ITunes only outputting left channel through Soundsticks

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