When we first created OA21 amplifier 35 years ago we simply did not know... We did not know that our simple and classic design amplifiers will be appreciated throughout the time and will become a part of the family. Many electronic designs has changed over and over but OA21 has been timeless. Like a well known watch or a world renowned car, pure and perfect - It's built to last to its owner and the next generations.
Behind every our design there are an important structure how we create it. For you it's important to understand what you are buying and why.