Logitech X-540 matrix mode distortion

[TheSniper]

So, I've got a Logitech X-540 5.1 set. They've got this nifty feature (matrix mode) which plays stereo audio from all the speakers. The other day, I noticed that when the volume being output from the speakers is too high, the audio just shits itself:

-The front speakers will remain silent, but the audio will patch in for just a moment every ~1.5-2 seconds, with the rear speakers doing the opposite

-Does this no matter what the input source

-Is entirely volume-dependant. It can be low volume on the source, high on the speakers, or the other way around, the problem only kicks in at some minimum volume

-Works fine in "regular" mode with stereo sources, don't have a 5.1 card on my laptop to test 5.1

-If I unplug all of the speakers, turn everything on, and connect the rear speakers first, the front ones second, then it'll work fine for a while

-All of the speakers are fine

-I've taken the board out, no sign of anything burnt or exploded.

Any ideas?

[Rez Prophet]

under speaker properties, do you have any enhancements or dolby bass boost or anything enabled?

[TheSniper]

It behaves the same with an iPod, my phone, laptop, and tablet. To answer the question though, no :P

[monty slick]

Doesn't want to stress the amp? Even still.

[Kraven]

how loud is this minimum volume?

[Cobaltsaber]

I have a g-35 headset that had virtually the same issue, just reinstall the drivers and you should be good?