The “Best of Two Worlds Power & Precision ECO” audio upgrade (BOTW P&P ECO) is the successor of SBooster's “Best of Two Worlds Solutions” audio upgrade (BOTWS). This new upgrade product combines power, precision and efficiency in a unique innovative manner that purifies the incoming current immediately upon entering the device. A dual stage mains filter and an earth line choke clean the current from high frequency pollution before the current reaches the transformer. The transformer is a custom-made audio grade transformer with electrostatic shielding. The electronic design allows for up to 50% more output out of the used electronics and consumes even up to 35% less energy than a conventional design. Even though it provides a significant boost in available power, the BOTW P&P ECO audiophile power supply is so efficient that it consumers only a fraction more electricity than what a standard power does.