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The Original



Color: Cherry




The Original Koostik is the result of a year of product evolutionary design and refinement.

It is Koostik’s first passive solid wood acoustic amplifier for the iPhone, and this now iconic design is in daily use in over 30 countries! It is a totally “unplugged” amplifier!

  • Passive amplification system
  • (2) Hemispherical sound amplification chambers
  • Carefully designed sound channels
  • Natural energy free amplification of between 10 and 20 decibels
  • Increase of 2 to 4 times the volume
  • Compatible with all iPhones
  • Handmade in Colorado, USA


American Cherry is a highly prized hardwood known for it’s beautiful pinkish-red coloration which mellows to a deep warm amber tone over time. It is relatively hard and thus finishes to a very smooth surface feel. Cherry has occasional “pith marks” which are small darker spots or streaks that run randomly throughout the tree. These are natural characteristics in the wood.

Email us at [email protected] for sizing guidance or other questions.

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