Problem with conexant smart audio hd

I bought toshiba satellite L750 with conexant smart audio hd sound card... when i connect it to my stereo, it's not the same sound as on other laptop with realtek sound card, it's very low. My phone with 3.5 mm jack gives better sound... is it hardware or software problem... pls help, tnx. 

SATELLITE L750-124 specifications
SATELLITE L750-124 drivers
Abysmal your model appears to be from Europe, perhaps Hungry?
I don't have a Conexant sound card, I have a Realtek, so I can't test anything.There doesn't appear to be much in the way of help or advice on this issue on our forum. Perhaps you'll have better luck on the Toshiba Europe Forums.
But, if you find a solution, we'd appreciate you posting it back here.
Good luck!
Mike

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