The Sbooster Single Unit, the "Best of Two Worlds Solution" audio upgrade power supply and the "Best of Two Worlds Power & Precision ECO" audio upgrade power supply and all our other products are designed and developed in the Netherlands.

In 2008, Wiebren Draaijer, founder of Sbooster / Squeeze-upgrade, received a Logitech Squeezebox as a gift. Soon he noticed the convenience of streaming audio, but as an audiophile he was totally dissatisfied with the sound quality of the Squeezebox compared to his high-end CD-player. With his background in electronics he tried to find a solution, that would improve the performance of the Squeezebox. It became clear that the standard supplied switch-mode adapter was the one that had a negative impact on the performance of the Squeezebox. The question was how to solve this problem? The Sbooster Single Unit was born. The “current improver” for almost all standard switch-mode adapters of small devices.

In 2009 Sbooster Single Unit is further developed and made production ready. Meanwhile, the Sbooster-technique was combined with the best elements of a linear power supply. The result: the Best of Two Worlds Solution audio upgrade power supply (BOTWS).

At the beginning of the product development some audio enthusiasts were asked to listen to the sound quality improvements. They listened  to our products over and over again and provided us with information to improve our prototypes. We are very grateful to them!

Due to the many requests outside Europe for our products and because of new high-res audio devices, like DSD-DACs, we started to develop the successor of the BOTWS audio upgrade at the end of 2013. This became the "Best of Two Worlds Power & Precision ECO" (BOTW P&P ECO) audio upgrade. At the development of this product we had the following goals in mind:
- Worldwide use with an equal performance at every mains voltage;
- Energy savings, higher efficiency and more power;
- Achieve an even greater improvement in sound by getting the most out of an audio device.