On the Abit NF7-S (I have the version 2.0 mobo), there is a 14-pin header\nwith mic and right & left audio (headphone) pins. Pins 5 & 6 are shorted by\na jumper as are pins 9 & 10 (for the right and left audio channels). This\nheader was designed for use with Abit's Media Kit, a bracket with audio,\nUSB, and firewire ports that fits into a 5-1/4" drive bay. My case already\nhas 2 USB, mic, and headphone ports in its front panel. I had reviewed the\nmobos and decided on this one thinking that I could then hook it up to the\ncase's front panel ports.\n\nThe problem is that the front panel headphone jack is a typical 3-conductor\nconnector: right, left, and ground/shield. So how do I connect 3 wires to 4\npins? In another newsgroups, a repondent said that pins 5 & 6 were both hot\nfor one audio channel as were pins 9 & 10. I assume there is a reason that\nthe header pins are shorted. If pins 5 & 6 were both hot (i.e., the signal\nline for the audio amp) and were both, say, the right channel then there\nwould be no reason for the jumper but then there would be no point to using\n2 pins on the header for the same connection, either. If it is a\ndifferential output which would explain why there are 2 pins for each audio\nchannel (rather than just a signal referenced to ground) then there would be\nno way that I could hook it up to the audio jack. The other respondent said\nto hook the audio jack's left conductor to one of the left audio channel\npins, the right conductor to one of the right channel pins, and the\nground/shield to the ground pin on the header. Sounds plausible except I'm\nstill leery of why there would be 2 pins on the mobo header for each audio\nchannel for a total of 4 pins.\n\nI'm not into audio electronics but if the 2 pins are differential outputs\nfrom the same audio amplifier then maybe that's to eliminate noise on the\nunshielded wires running from the mobo header to Abit's Media drive bay kit.\nBut if the 2 pins were for the differential output of an audio amp, wouldn't\nit damage the amp to have its differential outputs shorted together?\n\nThe case already has a front panel with 2 USB ports, a microphone jack, and\na headphone jack. So if I could hook it up to the header pins on the Abit\nmobo then I'd be happy. I don't need the 3 formats of card reader slots and\nthe IEEE-1394 (firewire) ports on the front that the Abit Media Kit\nprovides, especially since their drive bay kit costs . I don't have\nanything using firewire. I don't have digital cameras with memory cards,\nand even if later I get a digital camera then the USB connect to do the\ntransfer would be sufficient, or even the backside firewire port using\nAbit's bracket is sufficient.\n\nFor now, I can run the case front panel mic jack out through a hole in the\nbackside of the case to the mic port on the backpanel. It looks amateurish\nbut it should work. But I'd still like to figure out how to connect the\nfront panel audio jack to the mobo's header. I can't just also run it out\nthe back and to an audio jack on the backpanel because that would usurp one\nof the ports used to connect the 4-speaker plus subwoofer setup, and I don't\nwant to use Y adapter cables nor do I want the speaker connection moved to\nthe front panel on the case. There are times when playing games or\nlistening to music during the night when I don't want to disturb others that\nare sleeping. So I'd like to plug in a headphone and have the speakers cut\nout just like what happens on my stereo system.\n\nBefore you say that I should hookup my computer to my stereo system and use\nits headphone jack to perform the cutout, I don't want to do that. My\nstereo system is in a different room for use with my audio/video\nentertainment center. I would have to run both the computer and A/V center\noff the same surge protector to ensure impedance mismatch doesn't inflict a\nspike differential on the interconnected equipment that would be caused\nusing separate surge protectors, and I don't have permission to modify the\nhouse's wiring to install a whole-home surge arrestor. I want to keep my\ncomputer separate of my A/V center.\n\nAbit has not yet responded to my inquiry on how to hook up their header pins\nto the case front panel jacks. But then they have never responded to any\ninquiry sent to them. They don't care about end users and probably figure\nyou have to contact your OEM or retail seller but for a DIY (do it yourself)\ncustom built box (that you built), that isn't an option.