What is 4 cm tweeter?

A 4 cm tweeter is a very small tweeter, typically used in applications where space is extremely limited, or where a very specific high-frequency response is desired. Here's some key information:

• Size and Application: Due to its diminutive size, it's most often found in:

  • Portable Bluetooth speakers: Where overall size is a primary concern.
  • Soundbars: Used as part of an array to enhance high-frequency reproduction.
  • Automotive Audio: Particularly in car dashboards, where space is limited.
  • Computer Speakers: Especially in smaller, budget-friendly systems.

• Frequency Response: A 4 cm tweeter is designed to reproduce the highest frequencies in the audible spectrum. Generally, it will start playing from frequencies as high as 5kHz, and will go up to 20kHz.

• Materials: Common materials used in 4cm tweeters include:

  • Soft Dome Tweeters: Silk, treated fabric, or other lightweight materials. These tend to offer a smoother, more natural sound.
  • Hard Dome Tweeters: Aluminum, titanium, or ceramic. These offer greater clarity and detail but can sometimes sound harsh if not properly implemented.
  • Piezo Tweeters: Can sometimes be found in inexpensive applications.

• Power Handling: A 4 cm tweeter will typically have a low power handling capacity due to its size. Pay close attention to power ratings to avoid damaging the driver. They should be protected by a Crossover

• Limitations: Due to its small size, a 4 cm tweeter has limitations:

  • Lower output capability (less volume).
  • Limited low-frequency extension (higher crossover point needed).
  • Potential for higher distortion at higher volumes.

• Considerations: When using or selecting a 4 cm tweeter, consider:

  • The intended application and available space.
  • The desired sound characteristics (smooth vs. detailed).
  • The power requirements of the system.
  • The crossover design to properly integrate the tweeter with other drivers.