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3.5mm combo jack not working properly


New Member
Hi! I recently purchased a N40 unit. Previously, I had a Z83-F. Both have a combo 3.5 audio/microphone jack. In the Z83-F model I used a microphone, with an adapter. The adapter mixes two 3.5 mm female connectors (audio and microphone) into one single 3.5 mm connector The microphone worked properly with the Z83-F unit.

Now I connected the microphone to the N40, but the microphone volume is really low. Everything looks correct in the system, but the microphone is not working properly. The N40 unit was out of the bos an updated to the last windows 10 update available at the moment.

Is there a driver I have to update? What is the 3.5mm connection diagram? The microphone is the typical 3.5 mm connector for a microphone. Is the 3.5 mm connector different between N40 and Z83-F?

Thank you!


Staff member
Please check if the metal contact piece in the 3.5mm audio port does not touch the inserted device466


New Member
Yeah I know this is an old post, but I was also having issues with the Mic input on the N40 (I know you can adjust the Mic gain in the windows Audio recording setting but that didn't change my issue). I know with some Mics that they require a certain voltage from the Mic input before they'll work properly, if the voltage is too low it'll result in low audio (but this wasn't my issue), but maybe it was yours (or maybe the gain setting was just set too low on your system?)

I bought an 2x TRS female to TRRS Male cable (for Mic input and Audio out), it resulted in horrible buzzing as soon as I hooked the adapter up (with nothing connected to the female ends of the cable), so I got a other from a different brand thinking it was just a cheap faulty cable, same result. I then bought a TRRS 4 post screw terminal, and a TRS 3 post screw terminal so I could change the wiring, it resulted in the same, I even tried putting a capacitor in series to block the bias/line voltage on the Mic input to block DC voltage (a Mic input usually supplies a voltage so that a Mic can operate) to see if that was the issue, no change in the issue.

I then emailed support trying to find out how the 3.5mm jack on the N40 was wired, but I got nowhere with support.

So i just ended up buying a Sound Blaster Play! 3 USB sound "card" (they're just an external DAC) as the onboard audio (mainly the Mic input) just wasn't good, so I marked the onboard audio as a complete loss, so I disabled the Intel SST audio out and Mic input and just use the HDMI audio out, and the Mic input of the sound blaster.

I bought the N40 for a project and the Mic input was the most crucial aspect of the project (the other requirements is that it needed to be cheapish, small, and silent and it needed to be x86 running windows), it was almost a failure because of the Mic input audio was pretty bad that it just wouldn't work for what I was needing it to do.

The Sound Blaster Play! 3 solved all that and the project was salvaged and completed, and now everything works flawlessly.

Before I bought the Sound Blaster ($17 USD), I did try with a Sabrent USB sound "card" ($9 USD), while it was better than the onboard audio, it was applying some kind of filtering to the Mic input Audio so it would partially work but it wasn't useable, so that sound "card" was a bust.
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