5
Why choose
UPower
It is widely accepted that power is the key to any audio system. Pure power is the ultimate
goal of each and every music enthusiast. From a dedicated power source, an exclusive
wall socket, a quality power cord, down to premium filter capacitors, the pursuit for clean
power is everywhere.
Kingrex has undertaken to provide pure power since its establishment. From PSU MKII to
SLAP to the latest UPower, Kingrex continues to provide low-voltage DC power supplies for
almost all audio peripherals and is highly appreciated by consumers.
Your UPower differs from most USB power supplies on the market with its clean DC current
provided exclusively by battery cells. In order to achieve compact size and high capacity
many other providers of power supplies use two 3.7v/2500ma battery cells in parallel that
share a single protection PCB. Some Mainland Chinese products even come without
protection circuits at all in order to reduce cost. With this design, the 5V USB power can
only be achieved with a “dc to dc up converter” based boost switching power supply where
a 3.7v DC current is converted to a steady 5V output by passing it through a fast switching
circuit, up to hundreds of khz, and a simple filtering and regulating circuit. While you are
under the impression that you are connecting to a pure 5V DC current (battery) power
supply, your devices are actually being powered by an inferior 5V switching power supply.
This may work for charging purposes but not when used to charge your mobile phone or
MP3 player, or to power the playback function, because the sound quality could easily be
affected.
The Kingrex UPower has a completely new design and guarantees perfectly clean DC
current from its two output connectors.
The 7.5V input connector directly connects to the two 3.75V Sanyo quality Lithium-ion cells
