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PRIMO Noise Canceling Microphones received in Paris


Good afternoon everyone!


Lucas here. I hope my blog post finds you well. Last week, we received the microphones for the VK-X Noise Canceling system. I am happy to share some pictures of them and to present how we placed them. If you have any question, please post them below!



2,300 PRIMO Microphones



The Noise Canceling microphones are part of the components for which the sourcing was impacted due to this year’s electronic shortage. Luckily, Baptiste managed to find an identical reference from Japan-based and famous PRIMO brand and secured a 2,300 units stock that we received last week at the workshop. Each pair of VK-X headphones will house 2 PRIMO microphones for its Active Noise Canceling system. Those microphones are pretty small: 2mm wide and 6 mm round, – they did not clutter up the workshop yet, but we’re still counting 😉





How are they placed inside the VK-X?



Feed-Forward Noise Canceling microphones need to be perfectly isolated from the inside of the headphones to record properly the surrounding sound, which will be electronically canceled when playing your music. As you can see in the mechanical renders that Alexandre created for this post, we placed them on each earcup, behind the little 4 points grid located on the back side of the VK-X (the renders are showing the left side of the VK-X), which appeared to be an ideal compromise between design and recording position.


The ANC microphones are isolated from the inside of the headphone thanks to a custom Silicone Joint, itself held in the Internal Plastic Shell that fits inside the External Aluminum Cup.




How are they connected to the main Electronic Board?



Each ANC microphone is being soldered by hand at the workshop to its connexion cables as you can see on the close-up picture below. On the left side of the VK-X, the microphone is connected directly to the main “doughnut” electronic board. On the right side, the microphone is connected first to a small slave electronic board, that is then connected to the main electronic board through the headband.

VK-X battery presentation

Batteries received in Paris – Specifications


Hi everyone 🙂


Lucas here. Hope you are well! We just received more than 1,000 VK-X batteries at the workshop, so I took some time to write this small article and present it. We are available to answer your questions.


A unique battery


The VK-X battery is unique. We could have used standard batteries that exist on the market, which, considering the very limited available space inside the cup, would have highly impacted our battery life duration (a battery capacity is directly connected to its size). Indeed, the standard fitting batteries we found had a 750 mAh (mAh = Milliamp-Hours) capacity. By designing our own battery, we increased its capacity to 950 mAh, which was a  noticeable +26% improvement.



Our custom battery perfectly fits our cup,
thus maximizing its size and capacity.






You will find below the full battery specification list. Please note that the estimated duration will be confirmed after we finished our tests *

  • Rechargeable lithium-ion battery
  • Capacity: 950 mAh
  • Up to 20 hours with Bluetooth and ANC *
  • Up to 30 hours with Bluetooth only *
  • Fast charging time approx 1 hour max *



If you are curious about its actual dimensions, I just made some measurements for you: