I've tried connecting my stereo or other similar device to the headphone/mic output of my N800 using a cable with a 3-pole miniplug; however, the sound level seems reduced. What would be the best way of doing this? Am I harming the N800, since the headphone/mic cable that comes with it has a 4-pole plug? I've tried using a 4-pole miniplug to 3-RCA adaptor (2 audio + video) but get no sound at all on the audio RCAs.