2.5MM or 3.5MM Plug - Which Do I Need?

3.5mm or 2.5mm?

Here are a few helpful tips for determining the correct size jack for your shoulder (paddle) microphone.

  1. Your shoulder mic is a 3.5MM if it can accept an AUX or Auxiliary cord used for connecting a music source to a car.
  2. Older style wired headphones/ear buds are also 3.5MM.
  3. Your computer or monitor (if it has speakers) likely has 1-2 round ports for sound and/ or mic its usually green or pink, both are 3.5MM.
    1. 3.5mm Headphone Jack:

      • Size: The 3.5mm jack is one of the most common connectors worldwide. It’s the size of a standard headphone plug.
      • Usage: You’ll find it in most stereo headphones or earbuds that provide stereo sound.
      • History: It was first introduced in the 19th century and has become a standard for audio devices.
      • Advantages: Widely compatible, used in smartphones, laptops, and various audio equipment.
      • Disadvantages: None significant.
      • Example: If your headphone plug fits comfortably into the port, it’s likely a 3.5mm jack.
    2. 2.5mm Headphone Jack:

      • Size: The 2.5mm jack is smaller than the 3.5mm version.
      • Usage: It’s also commonly used in different devices but stands as the older version of the 3.5mm jack.
      • Advantages: Compact, suitable for specific applications.
      • Disadvantages: Less common nowadays due to the prevalence of 3.5mm jacks.
      • Example: If your headphone plug is noticeably smaller than standard headphone plugs, it’s likely a 2.5mm jack.

Remember, the 3.5mm jack is more widespread, while the 2.5mm jack is less common. If you’re unsure, compare the size of your headphone plug to the standard 3.5mm size to determine which type of port you have.

  • Your shoulder mic is a 3.5MM if it can accept an AUX or Auxiliary cord used for connecting a music source to a car.
  • Older style wired headphones/ear buds are also 3.5MM.
  • Your computer or monitor (if it has speakers) likely has 1-2 round ports for sound and/ or mic its usually green and/ or pink, both are 3.5MM.