I purchase two PC104. The first with VIA Eden 600 and the second with Intel Celeron 400. You can see specs at
I installed XP. This cards don't have headphone output but only speaker output (4 pins L+,L-,R+,R-). I've tryed to connect a headphone plugging together two -. It works fine, the audio has good quality bur there is a strong noise. (Also with two separated speakers...)
I try to low all volume (Speaker, modem,...) and the situation goes better but not ok.
All this with Via Eden. With Celeron the noise is terrible.
Do you have any suggestion to decrease the noise. (The sellers suggest me to put a condenser (2200) between +5v and ground).
Thanks, The Storyteller.