Visaton K 28 WP 28mm diameter 8 ohm waterproof mini speaker 
This Visaton K 28 WP 8Ω 2.8cm diameter miniature speaker has a plastic (Mylar) diaphragm which makes it well suited to an outdoor environment. It produces an excellent balanced frequency response and good voice reproduction and is particularly well suited for connecting to soundcards. There are cheaper alternatives on the market, but they do not match the rated output or the frequency range of this little speaker.

For maximum effectiveness and sound quality, it is advisable to mount this speaker inside a soundbox.

Specifications
  • Rated / maximum power 1W / 2W
  • Impedance 8Ω
  • Frequency response (–10dB) 300 to 20000Hz 
  • Mean sound pressure level 75dB (1W/1m) 
  • Excursion limit xmech ±0,5mm 
  • Resonance frequency 500Hz 
  • Voice coil diameter 10mm 
  • Height of winding 2mm 
  • Cutout diameter 21mm 
  • Net weight 0,007kg