PCHIFI is quite popular today. Audiophiles always want to achieve the best USB transceiving signal quality in order to improve DAC sound quality. They change different kinds of high quality USB cables, but usually don’t pay attention to the dirty computer USB 5V power. Computer power supply use high efficient, but noisy switching power supply. It has lots of interference affecting USB DACs sound performance. You may think the mobile power packs for cell phones can help, but they are still not clean because they use switching DC to DC chip to up-convert 3.7V to 5V.
In order solve this issue, we developed MP-U1. It employs the best Panasonic 3400mAH Li-on batteries and high current low drop out (LDO) linear regulators. It puts out 100% pure 5V DC power, isolates the dirty USB 5V from computers, eliminates noise, so USB DACs can sound noticeably better.
It can be used to power other 5V devices, but make sure the device consumes less than 2.1A current.
Sizes: W115mm x H60mm x L130mm
First connect the power adapter wall socket and MP-U1 host DC 9V power input, MP-U1 uses a simple single-switch operation mode, when the switch to the ON position, the panel indicator lights, then MP- U1 is in power mode, power mode, if panel lights went out, on behalf of the battery system is over-discharge protection function is activated, the battery power is exhausted can be used, needs to be charged. Simply switch to CHARGE position, panel lights will remain in the off state, this time the battery in charge mode, USB OUT output port stop the external power supply. Fully depleted battery takes about one and a half hour full, then the system will automatically stop charging.
1. Isolation between USB DAC purification powered computer
2. Card type ARM micro-computers, the number of broadcast music. For example: Raspberry Pi
3. Other applications require 5V supply clean, we recommend no more than the maximum operating current of 2A.
When the system power supply length: The system provides 5V 3400mAh of power output capacity, long working time according to the actual working current appliances may be. For example: For DAC general with power supply, MP-U1 is only responsible for supplying DAC’s USB chipset, the general current does not exceed 100mA, that is MP-U1 can supply about 34 hours.
USB cable connection method:
a) Method one: Use two USB cable, first connect the computer USB output port to the root MP-U1’s USB IN input. The second root connection MP-U1 USB OUT output of the DAC’s USB port to the input port.
b) Method 2: Use an isolated dual input head USB cable, one USB input header is only responsible for USB data transfer, disconnect the PC USB 5V power line. Also a USB input header is only responsible for power supply, does not participate in data transmission. The USB input header is only responsible for data transmission is connected to the computer USB output port, the only responsible powered USB input header is connected to the MP-U1’s USB OUT output.