Member Avatar for Member #23858

My computuer case front speaker wiring is listed as such:
mic in-, ground, spkout r, return r, mic bias, spkout L, return L
My motherboard wording is as such:
1.mic, 2. gnd, 3. ref, 4. power, 5. front audio r, 6. rear audio r, 7. reserved, 8. no pin, 9. front audio L, 10. rear audio L
I know mic in matches 1. mic, and ground-gnd, but what do I match up on the others? Help.

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  • Latest Post Latest Post by Thong_Ispector

Dani AI

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This thread is a typical front-panel audio mismatch: the case harness and the board header aren’t using the same wiring standard. supplied the case/board details, noted the connector difference, raised the single‑jack limitation, and reported a similar situation. Below are practical, safe steps to identify which wires do what and options to fix the mismatch without repeating the raw pin lists already posted.

Recommended procedure:

  • Confirm the header standard in the motherboard manual (the manual shows whether the board expects the older AC'97 scheme or the newer Intel HD Audio scheme).
  • Inspect the plastic plug on the case cable for markings and the physical keying (missing pin or notch)—these give a quick clue which standard the harness follows.
  • With the PC powered off and unplugged, use a multimeter set to continuity to trace each contact on a front jack (tip/ring/sleeve) back to the individual wires on the harness. Mark each wire clearly before touching the motherboard header.
  • If the harness and header use different standards, either repin the connector to match the board (use a wire/pin extractor, follow the manual’s mapping precisely) or obtain the correct replacement harness/adapter made for that board.

Important cautions: avoid connecting any wire to pins marked as power, reserved, or otherwise unspecified; do not hot‑plug the header while the system is powered; wear an anti‑static strap when working on pins. If the case has only one physical jack, it cannot provide both front and rear jacks simultaneously—an external USB sound adapter or a replacement front panel assembly are low‑risk alternatives if repinning is uncomfortable.

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Member Avatar for pcpalct

Can you possibly give me the case type and motherboard model if you have them handy?

Seems like the two have incompatible connectors...one being a 10 pin and the other a 7. Thanks :cool:

Member Avatar for Member #23858

EZ Media EZSOHOPLUS01 Mid Tower Case with a gigabyte GA-K8NS motherboard.

Member Avatar for vol

EZ Media EZSOHOPLUS01 Mid Tower Case with a gigabyte GA-K8NS motherboard.

I am in the similar situation too

I have Asus P-4-P 800 Max Motherboard

Member Avatar for Thong_Ispector

Do you have one or two speaker jacks on the front of your case?

You cant do left right front and rear with only one jack...

I will try to look up your case to see if it gives enough detail.

Usually the front jack is for headphones and kills the rear speakers for quiet operation when plugged in.,

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