USB Speaker/LED Cinema Display Problems After Upgrade to Mavericks

I just upgraded to Mavericks this morning.  My set-up includes a new (Late 2013) 27" iMac and a 27" Apple LED Cinema Display, with the mini display port and USB connected from the display to the iMac. 
I have a set of Bose USB speakers that I had plugged into the USB port on the Cinema Display for audio.  I didn't want to waste one of the USB 3 ports on the iMac so instead was using a USB 2 port on the Cinema Display.  This worked fine before upgrading to Mavericks.
Now with Mavericks installed, if I have the speakers plugged in, I get a tone that sounds like very loud feedback.  If I plug the USB speakers into one of the USB 3 ports on the iMac however, it works fine.
Does anyone know if this is a known issue with Mavericks?  I've read some other posts about display issues, but they were referencing USB displays.  In this case the display is connected via mini displayport, but the USB connection on the display seems to be causing issues.
Anyone else experienced this?

I've been experiencing additional issues with USB speakers. I plugged them into a USB port on the iMac itself (as opposed to the LED Cinema Display) and the feedback was gone.  However, now I get situations where the audio appears to randomly "die" on the system.  If I go into Audio preferences and switch the audio output to the internal speakers, the audio comes back on.  If I then switch it back to the USB speakers, it continues to work until it randomly dies again.  This happens typically 3-5 times a day.
If I just use the internal speakers as the audio output, I don't get any issues with losing the audio.  The USB speakers worked fine on the iMac before upgrading to Mavericks, and still work fine on my late 2011 MBP still running 10.8.5. 
I've read about other similar issues (http://www.imore.com/losing-audio-os-x-mavericks-heres-what-you-can-do-about-it). Still waiting for a fix.

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