Thread: A bit of help with sound please.

All respect to MB, but...Hm, I still don't think it have anything with NextGen settings.
Your device is stereo based (says on xTrons site). If you have 4 speakers, sound is divided only by adapters/cables that comes with it. And maybe with an amplifier. Do you also have it in car? Anyway, judging by the pic, unit is full responsible for distribution of sound:

Spoiler: pics from site

When sound is mixed, and you here it only from one speaker(!?), it mean sound is transferred to mono, and device does not send it to an adequate pair of speakers.
Maybe, there is some other factor, but we can only guess...