Low volume on rear channel of Aureal SQ2500

Dec 26, 2000
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Hooked up some Cambridge Soundworks FPS1800s to my Aureal SQ2500...
When in stereo mode, there is no volume on the rear speakers...
When in A3D mode, the rears are very faint...
I thought it might be the speakers, so hooked them up in reverse...now the rears are normal and the fronts are faint...so it's not the speakers...
Fiddled with the volume settings, unfortunately there are no volume settings for the rear channel...
Is this a hardware or software problem?
Any solutions?

Thanks.

btw: I am running Win2k and have installed the latest Aureal drivers for it.