I also had a problem with my sound card Auzentech X-Fi Forte front channels produce very little sound level at maximum volume. At normal volume seemed to be quiet. By its experiments I came to the problem.
The cause of most problems with the sound card is malfunctioning power analog circuits. So I connected the external balanced supply voltage (terminals 4,8 operational amplifier for the front channels and analog power ground the card.
After this relatively easy to do repair / edit the card again hear the sound from my front speakers.
Obviously this is a long dead topic but I am hoping to resurrect my dead Forte. Odaz, could you possibly provide a little more detail about what you did to get it working?