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Protro Co. Ltd.

Protro Co. Ltd. is a Japan company, located in Hamamatsu-shi Shizuoka. more detail is as below.

Company Information

  • Company Name: Protro Co. Ltd.
  • Country: Japan
  • Address: Hamamatsu-shi Shizuoka
  • International Area Code: 81
  • Phone: 81-53-428-8070
  • Fax: 81-53-428-8075
  • Website:
  • Product List: Electric Equipment And Parts
  • Category Activities: Electric Equipment And Parts
  • Type: Manufacturers
  • Profile: The Speaker Is Categorized In “dynamic Speaker” Where The Coil Moves In The Magnetic Field According To Fleming’s Left Hand Rule. The Speaker Has A Simple Structure With Less Number Of Parts Used In It, In Comparison With Conventional Cone Speakers. Practically, It Consists Of Only Two Major Parts: A Sheet Of Magnet And Diaphragm. A Real Flat Speaker With Patented Technology. The Dynamic System Is Formed With A Diaphragm, Made Of Flexible Film, Inserted Between Two Sheets Of Plastic (or Rubber) Magnet On Which Multi-striped Poles Are Formed. Overthrowing The Conventional Fixed Edge Concept, The Speaker Has An Edge-free Structure To Give The Diaphragm A Real Freedom To Vibrate According To The Input Signal With Fidelity. The Flat Speaker Shows Good Resistance Against Heat, Water, And Humidity And Has Good Structural Strength As A Whole.
  • Area: Shizuoka
  • Industry: Electric Equipment And Parts
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